I don't think I'd put peanut butter by itself in a crepe; the reason peanut butter and jelly sandwiches are so popular is that the jelly/jam helps cut the stickiness of the peanut butter.
But then again, I ate sandwiches that only had peanut butter in them for most of elementary school. Wash it down with some milk, and it's filling and tasty.
Sounds like folks have given a good number of alternatives, but I just wanted to share a resource: "Ableism/Language" by Lydia X. Z. Brown. It goes through a bunch of ableist words and suggests alternatives. :)