I have a hyper 7 year old boy, massive garden, do a two mile walk every day with my terrier and hound and want a dog to play out and not want to come in when my boy is boisterous, I am not a beginner but I do know that what the books say a breed is like and what they actually are like are two separate things.
Quite like Doberman, Rottweiler, Shar pei and Ridgeback.
Thoughts please/

and want a dog to play out and not want to come in when my boy is boisterous,

There is no breed trait as such of any dog which will do that, so breaking down a choice of breed to fit in with those two requests is not really possible, any breed can be trained and any breed can be contained in areas if you do not want them in your home at certain times, any dog may also decide itself that when your 7 year old son is being hyperactive or boisterous it will take itself off out of the way.

Dobermanns are known to be velcro dogs and Rotti's/Shar Pei's are also very owner orientated and protective, although all the breeds you have on your list can be trained guard dogs who will happily be outside protecting premises as pets they act quite differently and prefer to be with their owners, some may become quite distressed not being allowed in whilst your son is being hyperactive, tbh the breeds you are looking at with a son who may be unpredictable may be asking for trouble so you would need to be extremely vigilant and have containment in place, all breeds learn routine and learn the commands which we teach them, and all dogs of all breeds have different characters and personalities.

I don't allow any of my pups to go to homes with children under 7 years (unless an extra special case) as many children do much to stress a pup and vice versa, with a hyperactive, boisterous child you would still be coming under my rulings and personally I wouldn't recommend any of those breeds (others may disagree :-) ) until your child is much calmer and responsible around dogs, especially the highly reactive breeds which you have on your list.

Personally, I would just stay with the two you have already and wait until your child matures before entertaining any of the breeds you've outlined.

I know I haven't said what you want to hear, but it is just my opinion. :-)

My Ridgebacks don't like to be shut out in the garden. They want to be where I am. They also don't have the coat to enjoy being outside if it's cold or wet.

If you already have two dogs it sounds as though your son could do with some other hobbies to keep his mind occupied. Maybe let him join the cubs, learn judo/karate, swimming, chess etc. Getting another dog to be hyper with doesn't sound sensible.

Likewise my Rotties, wherever I am, so are they. In the mornings both my Rottie girls and the 2 kittens barge into the bathroom for fusses when I'm trying to have a wee. They crave human attention, and affection.

The breeds you have mentioned are generally known to be one person types.  Maybe a lab?  Or maybe a smaller dog that can be your sons dog rather than his babysitter, with your help he could train and work towards doing something competitive with a dog of a suitable size and temperament, terriers, cocker spaniels, beagles would probably be a better size for him to manage on walks etc.  Or as others have suggested find him a hobby that he can dedicate some of his energy to.

maybe you dont mean how I have read your post and  I appologise if I have misunderstood however if you are looking for a dog as playmate for your boy and feel that the dog may want to come in and get away from his boisterous behvaiour maybe this is not the right thing to be doing.
Dogs and children can wind each other up to the point of things being unsafe, also anydog should have the choice to play or to go away if things are too much for them
I dont think any breed would be happy this way and if you have 2 dogs already and its not helping yuor son as others have said maybe now is not the time for another dog but to concentrate on the ones you have and activities that you and your boy enjoy until he is more mature.
As he gets older and understand more about the needs of a dog he may enjoy any of the organised activities you can do with your dog ie obedience showing ( junior handler) agility and so on. Plenty of things to practice in your big garden then rather than just free play 

I think it depends on what you mean by " boisterous " .
If that includes behaviour that a dog would find threatening or frightening, then it's unfair to expect any dog to want to stay out with him, and is asking for trouble IMO.

Not at all sure what it is that is wanted, there seem to be two possibilities -

1/ you consider it a potential danger to have a dog around your son when he is in hyperactive mode.

2/ you want a dog to stay outside with your son when he is being hyperactive.

Not sure which of these are meant but the answer to either is that there is not a breed that should be subject to this, whilst your son is not able to interact with a dog in a calm manner he should not be in the company of one and of course should never be left on his own in the presence of a dog.

Thanks Novqa for being able to say what I was trying to but you put it so much better

Genuinely unsure what is being asked because a dog, any dog, should not be in the same home as a child with behavioural problems, certainly not in the same area and as this poster already has two dogs I fear a disaster waiting to happen - but - perhaps the original post is not written in the way intended or perhaps it is a wind-up - in the circumstances I hope it is the latter.

I agree Nova

I was wondering if you can describe how you mean boisterous, as one persons idea might not be the next.
How hyper does he actually get around he dogs?

Frankly Suejaw, no child should be allowed to get hyper in the company of a dog not even a little bit hyper they or the dog should be removed - otherwise there is a high risk of the child being clawed or bitten and the dog PTS. Children should only be allowed in the presents of dogs if they are calm and with an adult.

My idea of hyper I would agree with you Nova, just wondered if the OP was on the same wavelength as most of us, or all of us on that. I agree wholeheartedly with what everyone has posted above, I'm hoping the OP may have exaggerated or has a different interpretation of hyper/boisterous.. Trying to keep an open mind for this new poster..
Having an active child you wants to play and run about with a dog is possibly in some people's view a hyper child, who knows?!
But the question has to be aske with having a terrier they are normally robust active dogs and if that's not wanting to engage, well...

Would help if the OP really wants advice if they came back and explained their ideas and requirements.

I think that if your current dogs are wanting to come in when your boy is boisterous ( if I have interpreted what you say correctly), then it is possible that your son is behaving inappropriately with the dogs and the dogs are trying to avoid him.

You would almost certainly not want to subject any puppy of any breed to this, as it might trigger fear of children.

I would respectfully suggest that the key here might be to look at how your son is behaving with the dogs and seeing if you can help him to play with the dogs in a way they enjoy rather than try to avoid.

As others have said, we may have misinterpreted what you mean, so it would help if you could give more explanation about what you you mean by boisterous play and what it is that you and your son want the dogs to do.

a greyhound, or lurcher.

Inka, are you really saying that a situation as described in the OP is a good situation to put a lurcher or greyhound into??

If so, I'm shocked.    If the two dogs already owned by the OP won't stay around the child in the garden, then it's doubtful whether a lurcher or greyhound would feel any safer.

No dog, no matter how patient and good of temperament, should be put in a position to be tested to the limit.   The limit is usually what ends in disaster for the dog.

Yes, Nova I think your right & I think the op needs to respond to the ideas/suggestion that have come from their post started over 3 weeks ago.

Are you being serious??
I think you need be looking at some stimulation for your son rather than using the dogs as a 'nanny' or 'babysitter'.
That may sound harsh but with 2 dogs and a boisterous son already i really dont feel it would be fair to anyone to add more to the brood.