Metropolis
Greed by Erich Von Stroheim is another good one. OP, you should make a Classic Films thread.
F.W. Murnau's "The Last Laugh" is really impressive. The camera movement is amazing considering that narrative film was in its infancy.
This but Nosferatu comes damn close
gonna have to give this a watch some time...
Emile's performance in The Last Command with William Powell Da Gawd