You know that Christopher Lee was originally offered the role of Grand Moff Tarkin in Star Wars (1977).
Mr. Lee turned it down and the role eventually went to his good friend and Brillant Peter Cushing.
In 2002, Star War Saga finally have Mr Lee back.
His role in Star Wars: Episode II - Attack of the Clones (2002) was Count Dooku / Lord Sith Tyranus.
All the best!