Che Guevara: awesome revolutionary leader, medical doctor and geek.
From the Wiki entry on Che:
“As he grew older, he developed an interest in the Latin American writers Horacio Quiroga, Ciro Alegría, Jorge Icaza, Rubén Darío, and Miguel Asturias. Many of these authors’ ideas he cataloged in his own handwritten notebooks of concepts, definitions, and philosophies of influential intellectuals. These included composing analytical sketches of Buddha and Aristotle, along with examining Bertrand Russell on love and patriotism, Jack London on society, and Nietzsche on the idea of death. Sigmund Freud’s ideas fascinated him as he quoted him on a variety of topics from dreams and libido to narcissism and the oedipus complex. His favorite subjects in school included philosophy, mathematics, engineering, political science, sociology, history and archaeology.”