It's Disney World, so virtually every restaurant is a family restaurant (except V&A). So when you say "best", what criteria are you focusing on - quality of food, ambience, etc.?
Ours used to be Boatrights for breakfast due to atmosphere and quality, but they only are doing dinner now. I haven't had dinner there in years and years so I don't know how it is now.
We also like Ohana's and Kona. Again, because of atmosphere, quality and location.
I think a character meal is the best choice for families and some are buffets so everyone can get what they like. Chef Mickey's, Liberty Tree, CRT, the list goes on........................we love them all!