I would say that depends on your group and what type of meal you are looking for. There are some really good options, but they are very different.
Do you want a character meal? If so there's Chef Mickey at the CR or 1900 Park Fare at GF
Something relaxed and easy? Grand Floridian Cafe, Kona or the Wave
Non-character, but fun and all you can eat family style dining? Ohana