3. Bellatrix Lestrange
How can anyone not remember Bellatrix Lestrange in the Harry Potter films? I mean she is behind some of the most tragic deaths in the series and her entire demeanor is not only vile, but also truly terrifying. Like Alan Rickman, Helena Bonham Carter shines in this devilish role and makes her all the more frightening.
Bellatrix’s Best Film: Harry Potter and the Deathly Hallows Part 1.