Most places at Disney are very accommodating. Just be sure to make ADR at the restaurant and be sure to specify that you would like to be seated together. Some of the better places to pick would be...
Biergarten (should be easy to seat everyone together, but picky eaters may not like the food)
Mickey's Backyard BBQ (It takes awhile to get to the location, but you could easily sit together. It's a fun meal!)
Hoop Dee Do Review (It takes awhile to get to this place also, but it shouldn't be a problem to seat all of you together. It's also a fun meal!)
Boma (Tables could easily be moved to make room for everyone. It's a buffet, so everyone should be able to find something to eat.)
Via Napoli (They have a few very long tables. I'm sure they could reserve one of those of your group.)