From Ewan Roy in Succession to Sideshow Bob in The Simpsons, here are 15 truly unforgettable characters who elevated their shows – when they eventually turned up From Ewan Roy in Succession to Sideshow Bob in The Simpsons, here are 15 truly unforgettable characters who elevated their shows – when they eventually turned up Mike Hannigan was the only character to truly feel like a seventh Friend. He was the perfect match for Phoebe, a lightning rod for her kookiness and providing the solid family