Two of my favorites that have not been mentioned:
1. Garden Grill at Epcot: This is a 'family-style' meal, where they bring the food to you (you can ask for seconds). The food is usually a salad, turkey & flank steak, mashed potatoes, vegetables, and a dessert. I think that the flank steak is excellent (I usually request more steak in place of the turkey). Everything else is good, too.
The characters are Mickey, Pluto, Chip, and Dale. BTW, this is only character meal with Chip & Dale.
2. Garden Grove at the Swan. (Caveat: This restaurant does not accept the
DDP)
This is a rotating buffet, where they serve different foods on different nights (It rotates between Mediterranean, Southern BBQ, and seafood). I can only speak for the seafood buffet on Monday/Friday nights, but I've found it to be excellent and different than most other WDW character buffets. They have (among other things): Crab legs, peel & eat shrimp, and seafood risotto made to order. Also, they have a lot of different desserts that you don't find at other WDW character buffets & they have the best Caesar salad anywhere.
On Monday & Friday nights, the characters are Timon & Rafiki, other nights, the characters are Goofy & Pluto. BTW. This is the only place to have a character meal with Timon & Rafiki.