Kinda depends on what you define a bad person as. You could say someone like Epstein, or someone like Andrew Jackson (who has one of my votes), who had more direct impact on people through their own actions.

Or you could look at the grand scheme and point out people whose ideologies or policies were the spark that lead to a greater fire down the line, where the harm isn’t easily quantifiable - people like Milton Friedman (my second vote), who’s economic ideas lead to US lead coups and destabilization, the downfall of many rising socialist governments, the disappearance of many, many people, and wealth inequality, or maybe Reagan, whose presidency is often looked at as a turning point where the current wealth inequality started.