Boma is my personal favorite. Tusker House isn't too bad of a substitution if you want to be in a park or want the characters.
Other then that, the Wave's breakfast buffet is interesting with things like sweet potato pancakes, multigrain Mickey waffles, and their eggs Benedict with key lime hollandaise. It's also small, meaning the food gets refreshed very quick. Trail's End and Fresh at the Swalfin look like they have unique items, as well, though I haven't been to either.
Other then that, most breakfast buffet's are disappointingly the same: there are three or so unique items, then the same blandness. I'm being a bit snarky there, but I don't think most of them have very high quality food. They have a lot of it, though, and plenty of options.