Christopher Lee

[Glenethor]

Yes, that light of madness in his eyes. You see it when he is talking to Gandalf in his chamber ('you know of what I speak, Gandalf') and when he is on his throne and is in the process of trapping Gandalf. Then there is the scene just after getting orders from Sauron where his head is bowed, and he is hugging himself as if he had just had a run in with the Devil himself (which he did). The only scene I found kind of corny was when he was on top of Orthanc calling down the wrath of Cahadhras on the Fellowship. His overthrow in TTT will likely be worth the price of admission, as was Moria in FoTR.