Aristotle

Aristotle was a scholar.

Barbara Wright encountered him on the steps of a library in Egypt. He was holding an anachronistic book that she tried to take from him. (PROSE: The Book of Shadows)

He was the tutor of Alexander the Great when he was a boy. Alexander was so impressed with him that, as an adult, he did not wipe out the Greeks, though he did enslave them. (AUDIO: Mask of Tragedy)

Aristotle received a namesake in the form of the spaceship Aristotle, which served as a command ship of the Combined Galactic Resistance. (TV: Into the Dalek)

The Doctor once attended a birthday lunch with Socrates, Plato and Aristotle. Aristotle still owed her for the party hats by the time of her thirteenth incarnation. (PROSE: The Maze of Doom)