Thanksgiving Side Dishes that can be made in a Crockpot

I'm not much of a cook; but can manage once a year putting together a Thanksgiving feast for 18-20 guests. However, am always short on oven space and like to make at least two sides in a crockpot, if possible. I'm looking for suggestions for Thanksgiving side dishes that are not predominently corn, potatoes, or stuffing, as those are "already taken". TIA