Studying Hitler and Stalin and got to thinking about this question. I know you, my friends, will have good contributions. Stupid answers like 'Bush' or 'Obama' will be deleted with extreme prejudice.
Started with this search and found:
Top 10 Most Evil Men
Top 10 Most Evil Women
Most Evil Men and Women in History
Leopold II of Belgium
My main criteria is body count. Did Pol Pot and Hirohito/Tojo get into the millions like the top 4?
What do you think? I'm sure there's much I don't know that you can teach me.
PS: reading 'The Autobiography of Malcolm X' now and wonder how to factor slavery in. More on that in a subsequent post...