Alderaan said:
I can’t think of any bad films with good original scores.
A simple Google search reveals several webgages devoted to this issue. One lists 25 “bad” films with great scores. And that’s not counting TPM which I think is a terrible film with a fantastic score. And it took me all of 20 seconds to come up with three more off the top of my head, not on any of the lists: Godzilla 1985 (incredible exit theme), The Black Hole, and It’s Alive (score by Bernard Hermann, no less!).