Figure Historical Assassinate

The obvious choice is Hitler. I mean, think of all the people that would save. But there are so many others. I mean, Stalin led to nearly as many deaths as Hitler and so did Mao. Both of those would be choices. And if you go back in history there are so many people who could be killed to vastly alter the course of human events. But in truth, would it be better now? I'm not so sure. I think someone would have replaced the person killed who may have been much worse.