1. Paul Lukas in Watch on The Rhine- Bogart's performance may be more iconic but Lukas's is the greater achievement in pure acting. I read one article that described Lukas's win as bad because any descent actor could have given the same performance, I must say that reviewer is completely wrong. Lukas's performance is brilliantly fleshed out by Lukas in scenes when he is not talking suggesting everything without words, and equally powerful showing the conflicting emotions involved with the character's fight with fascism. This was not a run of the mill performance, any actor could have done, Lukas went beyond that creating a fascinating portrait of man struggling with the world.
Joseph Cotton in Shadow of A Doubt