Inspired by the worst dictators thread.
For the purposes of this thread, I'm not defining great by success, intellect, effectiveness, etc. But rather by basic morality, decency, concern for subjects/citizens/whatever. I am applying my sense of Western human values here, because that's all I know and is what I actually believe to be right. To the extent that any of us can know, which past or present leader seems to have been the best human being?
*Edit: Damnit, I meant to put this in pre-1900 . If this can't be moved, we can just vote on post 1900 leaders then.*