Hot take: Evil Dead
The first movie has a really egregious sexual assault scene (from a tree of all things) that Raimi has been on record saying he regretted putting in the movie.
Evil Dead II is almost like a scene-for-scene remake with much better production, acting, script, etc and in my opinion fully replaces the original.
Iโm glad I saw it if only to be able to compare with the improvements made from the original, but the first can reasonably be skipped entirely.