Writer and all around comic personality, Shearer is best known for providing many voices on the the Simpsons, including Mr. Burns, Ned Flanders and Smithers. He also starred in Spinal Tap, and hosts Le Show, a weekly radio program on NPR.

• Charles Montgomery Burns, the boss.
• Waylon Smithers, Mr. Burns' sycophantic side-kick. Rumored to follow an "Alternative Lifestyle".
• Ned Flanders, Homer's next-door neighbor.
• Lenny, Homer's nasal-voiced co-worker. "Not Lenny!"
• Seymour Skinner, Principal of Springfield Elementary School.
• Rev. Timothy Lovejoy, Pastor of the First Church of Springfield.
• Otto Mann, the school bus driver.
• Jebediah Obadiah Zachariah Jedediah Springfield, Town founder.
• Kent Brockman, emmy-winning newsman for Channel 6.
• Rainier Wolfcastle, a.k.a. McBain, hero of a series of high-violence movies.
• Dr. Julius Hibbert, Simpsons' family doctor.
• Dr. Marvin Monroe, Psychiatrist at the Family Therapy Center.
• Jasper, white-bearded inmate at the Retirement Castle.
• Kang, frequent alien visitor, brother of Kodos, has problems with depth perception.
• Herman, one-armed owner of a military antiques store.
• Captain McAllister, a.k.a. The Old Sea Captain. Owner and proprietor of The Frying Dutchman. Has two glass eyes and is not really a captain.
• God, the Almighty.
• Satan, the devil himself.
• Smilin' Joe Fission, character in SNPP's public relations films.
• Mr. Dewey Largo, bandleader and Lisa's music teacher.
• J. Loren Pryor, school district psychiatrist.
• Grampa Bouvier, Marge's father.
• Judge Snyder.
• George Bush, former US President. Had a feud with the Simpson men.
• Harry S. Truman, Minted the trillion-dollar bill.
• Adolf Hitler, "Das est eien boobie!"
• Pauly Shore, man from MTV; also on the spaceship; wants to do a show with Tom Arnold.
• Woody Allen, stars in a commercial in Japan.
• Birch Barlow, Rush Limbaugh knockoff.