That's one of those Peter Capaldi moments. One of those actors I'd never have thought of, but the second I hear it, I get very excited. "The Smiley Master." That could work.
Does no one realise this is the third thread talking about Smiley as the Master? Why start a new thread if it's already being discussed in another thread?
I'm not seeing it tbh. Not that I definitely think he's incapable, but I've never seen a performance from him that would lead me to believe he's a good fit for such an iconic villain.