We have around 50 people.
That said...
tomato-cheese pie (some german recipe)
relish tray (my cousins will eat ALL of the black olives off their fingers in 12 minutes)
crackers and some type of sliced cheese, shrimp dip, and/or cream cheese and pepper spread
assorted nuts (relatives as well)
deviled eggs
Any number of random appetizers
1 AppleJack marinated turkey (charcoal grilled)
1 brined-in-herbs turkey (charcoal grilled)
1 randomly cooked a different way turkey
Usually a ham of some kind
2 - 3 types of stuffing
mashed potatoes (someone forgot last year!)
sweet potatoes with those nasty marshmallows
green bean casserole
several cold salads
fruit salad
rolls of some kind or other
pumpkin pie
pecan pie
Quakertown Crumb Pie
cookies, brownies, and assorted yummies
** Note: Do not bring baked goods unless you're Mennonite or there might be a riot
Coffee
Assorted sodas
Bottled water
Don't smell my cup or you'll bust me on my beverage that I have to drink to deal with 12' alligators and 49 relatives. Well, 48... S and I get along fine.