Often you have someone called "worse than Hitler," prior to this was there another major figure people were compared to in this way?
This is a popular question.
See:
What was 'the worst thing ever' before Hitler and the Holocaust? What example would Godwin have used, if he lived at different times in history?
Who was considered the most evil person in history before Hitler took the title?
Today, Hitler and the Nazis are widely considered and offered as the ultimate in evil. Who or what was the popular analog before Hitler arrived?