Billy Corgan (of Smashing Pumpkins fame)and Eric Cartman (of South Park fame)are the same person. Dude, listen to their voices!

So, obviously Animal was Keith Moon.
Kermit the Frog was James Taylor.
Gonzo was/is Alice Cooper.
Dr. Teeth was Dr. John/Elton John.
Rolf was Thelonius Monk.
Zoot was Zoot Money.
The Fraggles were all fucking idiots.