Peter Venkman

Peter Venkman was a fictional character.

The Tenth Doctor compared himself to Peter Venkman. (COMIC: Revolutions of Terror)

Behind the scenes
Peter Venkman was a character from the movie Ghostbusters who led the team busting ghosts. He was played by Bill Murray. Having the Ph.D. title, Peter Venkman was, in effect, also a doctor.

Additionally a LEGO version of this character met the Twelfth Doctor in the webcast Doctor, Doctor, Doctor and in the video game LEGO Dimensions.