That was a good, if not complete list of actors. I'm with you on the "did not recognize" list - except for Ian McShane! It only lasted about 10 episodes, but you've got to check out Kings. And while the language is tough at first, Deadwood is so worth your time :-)

I agree with some of the commenters that David Hewlitt and James Marsters needed to be on the list. I'm not a huge Marster's fan myself, but there's a huge chunk of fandom that follows them. Once SPN ends, Jared and Jensen will have followings like that to every show they go to.