AK - Flame tree - The ribs and chicken, pulled pork samplers, or the ribs and chicken combo.
RainForest while not a QS - you can easily split the appetizer adventure for around 20.00 bucks, DH and I share it and leave quite full.
MK - Casey - most of the hot and fries can easily be shared the foot long chili, cheese is pretty tasty.
Cosmic rays - chicken dinner can be shared.
Columbia Harbor House - They have to platters that are easily shareable - There is one with shrimp, chicken and fish, fries and corn, and then one platter with chicken and fish, and the other shrimp and fish.
Epcot - There are so many options here,
DHS - This is where I struggle.. We really don't like any of the quick serve here.
You might want to think about heading over to one of the resort and checking out the food courts, there is alot of options out there. It gives you a chance to check out the resort, plus it gives you a break from the parks.
Another thought is that you can share meals at table service locations (except at all you can eat or family style). You could have an appetizer night, or share main entree's. When the Dd's were with us, so party of 4, between 1 appetizer, and the bread basket, 2 entrees, and 1 or 2 dessert we would be full and ready to go.
This does take some planning, and cooperation from everyone, when meal sharing.
Ohhh one more thought, breakfast in the room is easy and this can free up some cash for in the park meals.