Diabolik also has some nice ones:
The World of Apu (Satyajit Ray)
POINT BREAK’s ex-prez bank robbers.
Abel Ferrara in Ms. 45
Taking a big cue from Franju, Jerry Hall’s porcelain mask in Burton’s BATMAN.
I just saw this thread and had to point out that, in my humble opinion the greatest mask in film history is from Onibaba:
Sugar & Spice
Gawd, the music is awful . . . but that’s one HELL of a mask . . . the mask of SATAN!
Mario Bava’s Black Sunday
Thought this one would have already came up by now
Also one hilarious use of a mask was in The Ice Storm
Portrait of Madame Yuki (Mizoguchi Kenji, 1950)
Baby masks have always bothered me…
I meant to post Black Sunday mask but Soybean beat me to it. :)