Cromwell killed many of my family, forced them to leave Ireland—I have no love for the dictator. BUT I don’t think you can rank him with Stalin—who killed Millions of people.
Cromwell was not nice, he did make some good points - until he got real power. Robespierre was much worse of course, but Stalin and Mao and Hitler are the ones who deserve to be in that top box.
“Cromwell killed many of my family, forced them to leave Ireland”
You must be centuries old!
Proportionally, population wise, it was far worse for the Irish actually. Some estimates have half or more of the population of Ireland dead through the sword, disease, privation or sold into slavery.