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1. Aerosmith - Rock Band
Aerosmith appeared and performed in Season 3’s “Flaming Moe’s”.
Cameo
Nope
2. Luciano Pavarotti - Operatic Tenor
The only guest Tenor was Plácido Domingo, Sr., appearing in “The Homer of Seville”.
Cameo
Nope
3. Pete Sampras - Tennis Player
Sampras appears in Season 12’s “Tennis the Menace”.
Cameo
Nope
4. Adam West - Batman Actor
West has made several appearances, his first being Season 4’s “Mr. Plow”.
Cameo
Nope
5. Mikhail Gorbachev - Soviet Leader
In “Two Bad Neighbors”, Gorbachev’s role is voiced by Hank Azaria.
Cameo
Nope
6. Gore Vidal - Intellectual, Essayist, & Politician
Vidal appears in Season 18’s “Moe'N'a Lisa”, where he gets kicked out of a poetry club for admitting he titled his poems after random things he saw when trying to think of a name.
Cameo
Nope
7. Jose Canseco - Baseball Player
Canseco appeared in Season 3’s “Homer at the Bat”.
Cameo
Nope
8. Matt Damon - Actor
Cameo
Nope
9. Shirley Temple - Actress, Diplomat
She chose not to appear on the show.
Cameo
Nope
10. Barry White - Singer
White appeared in Season 4’s “Whacking Day”. He claims to “love the sexy slither of a lady snake” when asked to defend snakes from being whacked.
Cameo
Nope
11. Daniel Day-Lewis - Oscar-Winning Actor
Day-Lewis turned down appearing as “Side Show Daniel Day-Lewis”.
Cameo
Nope
12. Pope Francis - Pope
Pope Francis’s only appearance in “Haw-Haw Land” wasn’t voiced.
Cameo
Nope
13. Saddam Hussein - Dictator
Of course not.
Cameo
Nope
14. LeBron James - Basketball
James appeared in Season 16’s “Homer and Ned's Hail Mary Pass”, along with Yao Ming, Tom Brady, Michelle Kwan, and Warren Sapp.
Cameo
Nope
15. Paul McCartney - The Beatles
McCartney appeared in Season 7’s “Lisa the Vegetarian”. He only agreed to join the show of Lisa permanently became a vegetarian.
Cameo
Nope
16. Tony Blair - Prime Minister
Then Prime Minister Tony Blair appeared in Season 15’s “The Regina Monologues”. Homer mistook him for Mr. Bean.
Cameo
Nope
17. Elizabeth Taylor - Oscar-Winning Actress
One of many cameos from Season 4’s “Krusty Gets Kancelled”. She also voiced Maggie’s first word.
Cameo
Nope
18. Nelson Mandela - President
Mandela was never a voiced character in the Simpsons.
Cameo
Nope
19. Jeff Bezos - Amazon
Bezos appears in Season 20’s “The Burns and the Bees”. He wets himself at Billionaire’s camp.
Cameo
Nope
20. Buzz Aldrin - Astronaut
Aldrin aptly appears in “Deep Space Homer”.
Cameo
Nope
21. Tony Hawk - Skateboarder
Hawk appeared in Season 14’s “Barting Over”.
Cameo
Nope
22. Stephen Hawking - Astrophysicist
He appeared in four episodes, the first being “They Saved Lisa’s Brain”.
Cameo
Nope
23. Hugh Hefner - Owner of Playboy
One of many cameos from Season 4’s “Krusty Gets Kancelled”.
Cameo
Nope
24. Joe Frazier - Heavyweight Boxer
Frazier made two appearances, the first being Season 3’s “Brother, Can You Spare Two Dimes”.
Cameo
Nope
25. Julian Assange - Wikileaks
Assange appears in Season 23’s “At Long Last Leave”. He moves in next door to the Simpsons. He recorded his lines from house arrest in the UK.
Cameo
Nope
26. Tony Bennett - Singer
Bennett was the first guest star to voice himself, in Season 2’s “Dancin’ Homer”.
Cameo
Nope
27. Barack Obama - President
No president or former president ever provided their own voice for the show.
Cameo
Nope
28. Frank Sinatra - Singer
Harry Shearer provided the voice for any Sinatra appearances. Sinatra’s music has appeared on the show on occasion, though.
Cameo
Nope
29. Donald Trump - President, Businessman
Trump’s voice from archival footage was used on a YouTube video, but he never voiced anyone in the show.
Cameo
Nope
30. Ho Chi Minh - Dictator
Ho died in 1969. He’s actually never even been referenced on the show.