Post examples of great actors and greatest performances or scenes.
In my opinion great acting is being able to play any character, at the same time making the audience understand or relate somehow to the character. To me a great example of a great actor and without a a doubt my favorite is Edward G. Robinson. The man could play any kind of character, from a ruthless gangster, to a mild-mannered accountant, from a powerful father figure to a man on the verge of insanity.
Probably my favorite EGR film is House of Strangers:
I'm quite impressed with this one. It's the difference between stage acting, and street performing, he has to convince the people, up close, and personal. Only in this one, If he fails, he's going to die.