10. Jasper Beardly
Grandpa Simpson's retirement home companion Jasper often speaks slowly and with a wide-eyed sense of wonderment and resoluteness. He tried to freeze himself at the Kwik-E-Mart ("Whoa, time has ravaged your once youthful looks," he tells Apu, even though he was frozen for just a short period) and once sat in as a substitute for Lisa's class, threatening to discipline even the most minor infraction with a big paddle. Thanks to Shearer giving Jasper an indistinct Midwestern accent and a voice that sounds as though it's been to Hell and back, the character is a Springfield staple. But doing this character without Harry Shearer? Oh, you better believe that's a paddlin'!