What if ... >> Great Impotent Men Throughout History

Much has been made of Master Lloyd's impotence - so I got to thinking: is it really that big a deal for a great man to be impotent?
I mean: there have to have been great men throughout history who were impotent...right?

I think I once heard there were rumours that Hitler might have possibly been impotent, but I can't think of anybody else.
So is Master Lloyd maybe the first great man in history who can't get an erection?
Is there anybody else?