I think Tilda Swinton definitely belongs in this category, but she’s kind of “breaking out” with her role in Constantine and her upcoming role as the White Witch in The Lion, the Witch and the Wardrobe.
“Deadwood” features three guys mentioned in this thread:
Brad Dourif, Stephen Tobolowsky, and Jeffrey Jones. For all I know they could all have a scene together in tonight’s episode.
“Deadwood” also features William Sanderson.