I'm unfortunately going to have to remove this question. It's a topic that would bring in too many awful answers and would not be something that we'd like to have in this subreddit. We ask for specific questions here, which I assume you know since you've probably read our rules.
If you have specific question about a historical persona, then you are welcome to ask. Keep in mind that the Oatmeal comic about Christopher Columbus has been debunked (use our search function!).