
Well young thug sounds just like my youngsters would be, so I would have him on lead when you let them into the living room after they quiet down.
The others should be told to lie down if they will obey.
If visitors get up then pre-empt silliness with a down and stay command, so they have alternative behaviour to getting silly again.
If your control has not advanced with them to that extent yet, then I would calmly lead them out before the visitors do anything that sets them off, and again command a down and stay.
If they have crates then if they are still going potty during visits, and a shut door would only get leaped at then I would crate them out of sight of the visitors until quiet.
I would insist that when the doorbell rings they are quite, and you need to act very calm yourself.
Sometimes it is worth disconnecting the doorbell, if you can easily spot someone at the door or coming up the drive, or asking regular visitors that they ring before they come. The doorbell can be a trigger for the excitement, I get it when a doorbell like ours sounds on TV.
I do use a water squirter on mine if they do not quiet when I say, but they are not sensitive souls, they just find a jet of water in the face irksome, and prefer to avoid it ;)
As for when you have them in with visitors, any intimidating behaviour then calmly remove them from the room, and they get to watch through the baby gate.
I have five now (half the size of yours, but as similar look to the untrained eye), so I do have them behind the baby gate when I have visitors, but if they are not doggy folk they stay there until the visitors leave, this way they realise that all visitors are not there just to see them, as before it used to get a bit much with them all vying for visitor attention ;)
Oh lastly, until the dogs are calm and you have this cracked, ask visitors to act as if the dogs are not there, ignore them totally and no eye contact.