Who is the bad guy of the 17th century?

Of course, the answer to this question is a matter of opinion. Some might argue that Oliver Cromwell was the bad guy of the 17th century...at least in Europe. He became a dictator in the Commonwealth of England and passed outrageous laws that led to severe oppression of Irish Catholics. He had the former King of England beheaded and, by driving out all who opposed him, created a Rump Parliament that consisted entirely of his supporters.