My faves are:
Russell Crowe
Tom Hanks
Robert Duvall
Gene Hackman
Mel Gibson
Denzell Washington
I could list many more, but those came to mind first.
I also enjoy watching Ed Harris, William H. Macy & Kevin Spacey. Oh, and Anthony Hopkins.
Recently removed from my Best Actor Working Today list:
Marlon Brando
Richard Harris
I'm glad to see Duvall in your list. He's been around a very long time, and has excelled in every movie I've seen him in, often overshadowing the stars ("Falling Down" anyone?), yet he's rarely mentioned in favorite actor lists.
However, I don't like Hanks anymore, at least not since he became a big shot and stopped trying to act.