There really isn't any sit-down (waiters/waitress) breakfast restaurants in Epcot. It counter service for breakfast.
There is Spoodles (BW) has a full breakfast menu, Beaches & Cream (BC) has some booths -- they have bagels, breakfast sandwiches, muffins but its mostly take-out. the YC Galley(YC) has the option of a buffet or ordering off a full breakfast menu.
Cape May Cafe (BC) has a character buffet breakfast.