A pumpkin is too easy to find in the soup. There's no challenge.

Beans soup, chickpeas soup, lentil soup, they are all amazing.

My favorite is beans and sauerkraut soup and Ukrainian borstch

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".