Khrustalyov, My Car! - the best movie about early soviet homosexualism:
https://youtu.be/VGOJ1aE9SMI?t=5958then we have
Un Chien Andalou - european move about live in Europe after Hitler
Evilenko - about orthodox CPSU apparatchik
Cargo 200 - about soviet afghan
Enemy at the Gates - accurate historic movie about WWII
Child 44 - banned in Russia due to the negative portrayal of the glorious leader Stalin.
Eraserhead - classic american drama movie about family relations. Some consider it a comedy.
Captain Berlin versus Hitler - a move about life in Germany