places we frequent:
DTD - Wolfgang Puck Express and Earl of Sandwich are hands down the best options. Luckily you can compare the menus on the spot as they are across from each other in the Marketplace area.
DAK - I usually go to Flame Tree. My wife and daughter go to Pizzafari.
DHS - It's been three trip since we did SWW. It was crowded. Backlot Express is near Star Tours and I don't remember it being particular crowded. It was a nice respite from the crowds and the heat. We have gone back the last couple of trips. Simple fare.
Epcot - Plenty of choices. Sunshine Seasons has a wide variety of well prepared foods so your group can opt for a number of different tastes. The World Showcase has a number of spots that are good. We often pick up food from different pavilions and meet to eat. Some of my favorites are fish and chips in England, shawarma at Morocco, brats at Germany and munching at the patisseries in France. I like Cantina de San Angel but it's supposed to be closed until this Fall. They are building a new facility that will have both TS and CS options.
MK- We have been spending a lot of time here because of younger children. Columbia Harbor House has some different choices that are generally haelthier than most things at the MK. We often eat at Pinocchio Haus for lunch. Often a salad is all I want for lunch on hot days. Pecos Bills and Cosmic Ray's both have fairly wide selections and fixin's bars. I personally give a slight edge to PB but I kind of doubt I'm in the majority. Since Cantina de San Angel is closed you may want to check the daily times guides for El Pirata Y Perico. It's a seasonal place with limited, but tasty, Mexican style food. When we were there last June though it was open for lunch only.