Mads Mikkelsen is great at playing the bad guy. After much-acclaimed performances in incredibly successful films like “Rogue One: The Star Wars Story” and “Another Round”, the Dane now plays Grindelwald, the dark wizard in the “Fantastic Beasts” world. In the series’ latest sequel, “The Secrets of Dumbledore”, Grindelwald has set himself no lesser task than wiping out the muggles – as people without magical abilities are called in the Fantastic Beast universe. Not everyone was happy about the prospect that Mikkelsen would replace Johnny Depp who had starred as Grindelwald in the first two spin…