Sorry if this has been asked before. But before Hitler became one of the worst humans in history, who did people claim was the worst at that time? Atilla the Hun? Who was the worst bad guy prior to Hitler?
By the subreddit rules, it's O.K. to ask questions that have been asked before. I was surprised that there's an entire section of the FAQ about this at https://www.reddit.com/r/AskHistorians/wiki/theory#wiki_who_was_considered_the_.22most_evil_person.22_before_hitler.3F
In the app, the # anchor doesn't work, so look for 'Who was considered the "most evil person" before Hitler?' about 2/3 down the page.
Posting links like this is not intended to discourage discussion. Further questions, data, and debate are welcome.