Epcot: Sunshine seasons, Mexico (great soft shell taco combo meal with tortilla chips and churros for dessert), France (the ham/cheese quiche or the ham and cheese croissant sandwich is excellent and then you get one of the fabulous french pastries for dessert)
MK: Be our Guest (lunch only; the pork is excellent and the desserts are also very good), Columbia Harbour House (great atmosphere and more unique foods), Cosmic rays
AK: Yak & Yeti CS (huge portions), Flametree bbq (good ribs and pulled pork)
DHS: Starring rolls cafe (for lunch-huge sandwiches and enormous cupcakes for dessert)
hope this helps