6. Otto Mann, the Bus Driver
Springfield Elementary's bus driver is such a stoner burnout parody that even his last name sounds like it could be one of his character's lines: "Otto, maaan." Speaking in a gruff, hippie-like drawl, Shearer nails endearingly aloof expressions like, "Yo, Bart dude," and – after hearing the items in his in his apartment after getting evicted – "Wow, I had mustard?" And as with all of Shearer's many supporting roles, the actor managed to tap into some otherwise lost human quality in the character, looking alarmed when Homer tells him that Otto backwards is still Otto and begging Homer, "Please let me stay here" ("The Otto Show"), and then seamlessly transitioning back to burnout. "Spell AC/DC!" Otto tells Lisa in "I'm Spelling as Fast as I Can." "A-C-D-C," Lisa replies. "Nuh-uh," rejoins Otto. "You forgot the lightning bolt!" It's Shearer's innocent delivery that makes that funny.