3. Dominic West
Dominic West would be a great choice to take the role of the Master in a direction that we've never gone before. We've had debonair with Delgado, campy with Ainley, and manic with Simm. West could give us a Master that was cold, aloof, and even cruel. A different approach, but somehow still the same man. It might even seem like a logical progression from the madness and intense emotions from Simm, to have a Master that buries any feelings he has down deep. The only way for him not to feel everything is to feel nothing at all. While not usually typecast as a villain, I've seen enough of his nastier characters to think that Dominic West could give us an iconic interpretation of the Master.