Rokuro Mabuke or "Rock". The intelligent and handsome, yet sick and evil villian from Tezuka Osamu's manga, "Vampire".
There's even a live action TV series of Vampire which Tezuka stars as himself! XD
Rock also appears in a lot of Tezuka's mangas, playing various roles, but mostly as a villian. In Black Jack he had a number of roles, but most noticably as Black Jack's best childhood friend, Makube.