Actors with extensive resumes that you were completely unaware of

My wife and I just got done watching the “John Adams” miniseries on DVD this week, and I was curious about Stephen Dillane, the actor who plays Thomas Jefferson, since I thought he was excellent in the part but his name wasn’t familiar at all to me. Holy cow! This guy has over fifty entries in his IMDB listing, going back 20 years. Granted, a lot of it looks like either TV work or European titles, but still… you’d think he would have been in something else I’ve seen before.

What actors have completely slipped under your radar for years?