I'm going to take one of the most evil men to ever live,
Adolf Hitler. There's no denying two things. First off, he caused some absolutely heinous things to occur...probably some of the most horrific ever. Secondly, he did a great job of leading his people. They would follow him to the ends of the earth. Just look at what he had many people convinced to do...people who were just normal human beings. Anyways, he'll be my political leader for now.
Wikipedia
There's a tonne of stuff out there about the guy, so just look for yourself if you really want to.