I was going to mention the Poly also -- Captain Cook's is in the Great Ceremonial House, and they have the famed Tonga Toast (stuffed French toast) from the Kona Cafe sit-down restaurant.
I like the croissant sandwiches at the Main Street Bakery. Starring Rolls at DHS is ok for sweet rolls. I remember getting a good cinnamon roll at Kusafari Bakery at AK, but I'm not sure if they still have those since Tusker House changed into a TS restaurant and the building format changed. At Epcot, we don't eat CS until World Showcase opens -- lots of good options at the French and Norwegian bakeries.
I did enjoy Boardwalk Bakery, and the beignets at POFQ. And for whatever reason, they had really good pancakes at Roaring Forks in the WL. I don't really even like pancakes, but I ate them almost every day during one trip.