
Cats seem to do very well on 50/50 raw and kibble, if you didn't want to go 100% (or have trouble switching them over), my last cat was 50/50 as it wasn't easy to find a way of getting enough bone into her diet.
She wasn't keen on the Prize Choice minces I used for my dog - or rather she was picky about them and would only eat one variety - so she also had mince from the butcher or supermarket, diced chicken, pork or turkey, kidney and especially loved diced lamb's heart. (I was lucky to have a local butcher who would sell me cat-sized portion amounts of various meats). She also had canned fish now & again. I can't remember if she liked raw eggs but some cats do. She would have one raw meal a day and a small bowl of kibble (usually JWB or Royal Canin) always available to free-feed from as she had outdoor access and got plenty of exercise.
I once bought a dressed wood-pigeon from a game stall at a farmer's market, I took off the breasts for her, and she also had the wings and legs (looked like doll-sized turkey drumsticks!) - that was probably the only time she actually ate the bone as well - and my dog got the carcass. She would also get some raw pheasant if I was lucky enough to get one.