Fear and Loathing in Las Vegas. Best drug movie ever in my opinion, but for comedies what you listed are some of the best .
I usually hate telling people to search...i dont mind having duplicates, and i know it can be a pain in the ass to search somtimes. but i leterally posted on a thread YESTERDAY!!!! with almost the exact same title and the same general gist. YESTERDAY
Anything with Pee Wee Herman. Trainspotting. Willy Wonka and the Chocolate Factory (The one with Gene Wilder, not the shitty new version) Anime. The more blood and tits the better. Elfen Lied rules. Blaxploitation films are always good, but you have to be reaaaaaallly stoned.
I went and saw transformers while high and omg that is the best movie ever i did not expect to see so much action when thier fighting its amazing i suggest everyone go see it stoned