[Elmo]

Out of the listed options, I'd go with Garden Grill. The food was good (not great) and the characters are always fun. The atmosphere is fun with the rotating restaurant, etc.

Walk over to Epcot for dinner, then jump on the monorail from Epcot to MK. It is a monorail ride many don't get to take. We then take the bus from MK back to the BC at the end of the night.

You have so many other dining options in walking distance. I'd call the dining line and see what they have in Epcot with a good time. Don't forget Spoodles and the othe places along the Boardwalk.