Least: TMP. Like others said, it's a very Point A to Point B story.
Most is a tie between: TFF and FC.
-- TFF relies on Sybok getting a ship he can take over. And given that both the Klingons and Romulans would probably just kill him on sight, that leaves the Federation. And then it has to be a Feddie ship he can take over. Had it been a fully crewed and armed ship (say Excelsior for example), he'd been properly fucked over. Plus Kirk acts like an idiot: Why risk a ground engagement? Ship's phasers to stun (unless the refit did away with that option), stun the city, extract hostages, lock the rest in the brig.
-- FC relies on Data being so hot for the Borg Queen And jonesing to be human that he wastes the whole movie waiting for Picard to show up and have his Die Hard moment before trashing the coolant tanks--which just happen to be completely out in the open and as brittle as glass.