Leah Schnelbach has put out a Ranking of 1980s Fantasy That Would Please Crom Himself!.
I’ve seen most of the eighteen movies she profiles, although I somehow missed Cave Dwellers, both as itself and its MST3K episode. In any case, her rational for each pick is well reasoned.
Still, the top three fantasy movies from the ’80s are clearly:
1) The Princess Bride
I will suffer no dispute!