I really liked John Hurt. He was so convincing as Winston Smith getting tortured inside the Ministry of Love in 1984, I was always surprised to see him alive and looking okay afterwards.
photo by Georges Seguin
It kind of shows my taste in movies that I remember him from 1984, and as the guy who had an alien implanted on his face in Alien, and as the Viking king in Outlander (the science fiction version of Beowulf).
I know he played Caligula in I, Claudius, but I can't really think of him as playing that role, though I vividly remember a number of the Caligula scenes. As an odd twist, my mother said she recognized him in Alien from his body, not his face, because she had seen him doing his odd dance in I, Claudius