Actor/Actress with the Most Impeccable "Nerd" Credentials

Ian Holm was in more stuff than I realized.

Alien, Time Bandits, Brazil, Naked Lunch, Frankenstein, The Fifth Element, eXistenZ, The Lord of the Rings: The Fellowship of the Rings, The Lord of the Rings: The Return of the King, The Hobbit: An Unexpected Journey, The Hobbit: The Desolation of Smaug, The Hobbit: Battle of the 5 armies

And Harrison Ford, of course.

And Arnold Schwarzenegger.

But, I'd probably go with Hugo Weaving. Since the Matrix, he's been in seemingly everything.