Yeah! Look up white bean soup or navy bean soup, those are the classics. I was just spit balling though - my favorite thing about soup is you can put whatever the heck you want in there.

Edit to add: Pumpkin soups are totally awesome too! One of the best ones I ever had was pumpkin soup filled with chunks of seafood and served in a roasted pumpkin. At first I was like "seafood, pumpkin? Blegh." But then I tasted it and I was like "oh damn".