Nobody likes a bully, and Dolores Umbridge is as big a bully as they come. Played with some relish by Imelda Staunton, Umbridge's role should have been a helpful one; she was supposed to be teaching students how to defend themselves against the Dark Arts. Instead she was cruel, manipulative and condescending, and her later turn at the Muggle-Born Registration Commission eventually saw her prosecuted and sentenced to imprisonment in Azkaban.
Staunton's name had been up in lights long before she was cast in Harry Potter, and her starring role as the title character in "Vera Drake" won her BAFTA awards and Oscar nominations. A stellar performance as the wife of Alfred Hitchcock in the TV movie "The Girl" earned similar plaudits, and it was no surprise when the Queen made her a Commander of the Order of the British Empire in 2016, in recognition of her services to drama.