In MK, Pecos Bills and Cosmic Rays have the toppins bars.
In AK, Restaurantosaurus has one as well.
Don't think there is any in Epcot or DHS.
For food, we love Pecos Bills. The taco salad is great.
Cosmic Rays has a rib/chicken combo that is big enough to share with a couple extra sides.
Sunshine Seasons in Epcot always has good food and a big variety. Asian, sandwiches (both of which I can recommend).
They also have a grilled pork chop the size of a 16oz steak. It is huge!!
Also a soup/salad station.
AT DHS, Starring Rolls gets our money. The sandwiches are so big 2 healthy eaters can share one. And they also have large/very good cupcakes for dessert.
Have a great vacation.