Villain Poll (Note)

Note:

In Harry Potter and the Deathly Hallows Rita Skeeter said in her book, "The name of Grindelwald is justly famous: In a list of Most Dangerous Dark Wizards Of All Time, he would miss out on the top spot only because You-Know-Who arrived, a generation later, to steal his crown." - J. K. Rowling Harry Potter and the Deathly Hallows

This might prove, you could say, that Grindelwald is the worst villain aside from Lord Voldemort. However, That is Rita Skeeter's opinion and not everyone elses.