All right. Time to discuss Fantastic Beasts: The Crimes of Grindelwald. In case you were wondering, the Fantastic Beasts series is a spinoff and prequel series to the Harry Potter series. At the moment, the worst villain in the Fantastic Beasts series is Gellert Grindelwald. For a record, here are his crimes in Fantastic Beasts and Where to Find Them and the sequel Fantastic Beasts: The Crimes of Grindelwald - Impersonating a man named Percival Graves and possibly murdering him; manipulating Credence Barebone in order to turn him into a weapon against Albus Dumbledore (and cruelly rejecting Credence after tracking his sister Modesty); attempting to expose the Wizarding Community; murdering Rudolph Spielman and some Aurors; ordering a family to be murdered; ordering Irma Dugard to be murdered; and convincing Queenie (one of the main protagonists) to join him and corrupting her as a result.
However, I don't think he qualifies at the moment. He apparently felt remorse at some point, he is outclassed in heinousness by Voldemort (who started two wizarding wars, individually murdered over twenty people including his own family, and committed several other unspeakable acts), and his story arc isn't over.
What are your opinions?