from the late ‘60s’ or so, Valerie and Her Week of Wonders.
from the ‘70s’, The Wicker Man (I would call it marginally a fantasy, others wouldn’t—a great film anyway). I mean the original movie, not the remake with Nicholas Cage. avoid the remake.
from the ‘80’s, The Company of Wolves (as much horror as fantasy, though not in a traditional way and also inspired by the previous film)
from the 2000’s, Pan’s Labyrinth.
Valerie would easily fit into my favorite ten movies of all time, if not my top five. amazing, amazing film.
as well, a few ‘80’s films which I personally don’t especially like: Legend and Excalibur. the latter goes from good (the start) to not-so-good (the middle) and then good (the end). you might like it. I haven’t seen any of Ladyhawke, which also came out in the ‘80’s. some people like it.