Rubber
Cannibal Holocaust
The Human Centipede is one.
I was going to say this and its sequel.
The Rocky Horror Picture Show
The Forbidden Zone with, among lots of other strangeness, a score by Oingo Boingo, Danny Elfman's rock band.
Eraserhead, hands down! 😎
Eraserhead wins closely followed by Reflections of Evil
I've never seen that one, but I checked on IMDB, and it does look weird. 😎
The House with Laughing Windows (1976)
3-Iron
El Topo
That was very strange, but not as strange as Eraserhead. 😎
I Heart Huckabees
Very weird, but I liked it.
I liked it too. Great movie