my favorite cult movies are:
house on haunted hill, 1958 vincent price
journey to the center of the earth 1959 james mason
the terror 1962 jack nicholson, boris karloff
carnival of souls 1963 candace hildebrand
bonnie and clyde 1967 faye dunaway
easy rider 1969 peter fonda, dennis hopper
duel 1971 dennis weaver
the black hole 1979 ernest borgnine
the clash of the titans 1981 harry hamlin
the trip to bountiful 1986 john heard
ed wood 1994 johnny depp
sling blade 1996 billy bob thorton
shadow of the vampire 2001 willem dafoe
napolean dynamite 2004 jon
not sure all these would be considered cults, but i love them.