5. Mrs. Eleanor Iselin, The Manchurian Candidate (1962)
Played by: Angela Lansbury
Before Angela Lansbury was known as the sweet old woman from Murder, She Wrote, she broke onto the scene as the diabolical head mistress Mrs. Iselin in The Manchurian Candidate. Iselin worked for the Soviets to handle her son, who had been brainwashed into becoming a political assassin by communists during the Korean War. She’s as cold as she is British, and her prim and proper facade makes her a worthy adversary for democracy.