The underbelly of some great men in history

One example is not extreme enough: Gandhi's misjudgement was due to a lack of data. It's not a stable prejudice like the one he had against the untouchable caste, however much he talked the talk in that case.
FDR, too, had worse aspects than just being in a wheelchair -- mostly to do with racism, but that one's pretty easy for any figure going into the past.