Part of the reason Oldham is so hard to place is because he doesn't have a "look." He can so very completely take a character on physically. It's amazing to me.

Now, I love Alan Rickman too -- every since I saw him in Robin Hood, but he's an easy spot. Oldham is not at all obvious.

I saw Richard Harris in person. When we lived in Atlanta, he was in Camelot. And Amazing.