Harvard has a history of hiring right wingers in certain disciplines out of pure "contrarianism" and a desire to stir up academic controversy. As someone with a background in history, I can specifically point to the late Richard Pipes and the currently alive Niall Ferguson as incredibly right wing people (extremely so in Pipes' case, who comes off as an unreconstructed believer in absolute monarchy in his books) who have used "taught at Harvard University" as basically a way to get everyone talking about how different their takes are.
That doesn't make the university as a whole "conservative."
off the top of my head, two other prominent examples of this phenomenon are Alan Dershowitz and Sean Spicer