Could be fun to have your guests bring the recipes and expertise and trade them around. Then everyone gets a little souvenir of the dinner.
Here's my list, heavy on the midwestern memories. Pick and choose!
Turkey
Mashed potatoes
Dressing/ stuffing
Gravy (Got a gravy expert?)
Greens or peas or green bean casserole
Yams or sweet potatoes - like mine with butter and maple syrup
Relish tray - olives, celery, radish, carrots, pickles, pickled apples, little salad peppers
Little squash (if you have a vegetarian, stuff several with the dressing)
Rolls or biscuits
Cranberry sauce. Tastes best from the can
Pumpkin, apple, or cherry pie. If you make cranberry sauce, make it a bit sweet and you can drizzle some over cheesecake.
I'm so not frugal during Thanksgiving... but then, after a nap, after I collect the bones and make turkey stock, I become frugal again.