Gregory Lenoir Allman (December 8, 1947 - May 27, 2017), known as Gregg Allman, was a rock and blues singer, keyboardist, guitarist and songwriter, and a founding member of The Allman Brothers Band. He was inducted with the band into the Rock and Roll Hall of Fame in 1995.
He appears as himself in "Let's Go to the Hop". Peter Griffin asks a poster of him for advice as to what he would do in his situation, at which time he momentarily comes to life tells him what he used to do, none of which he recommends.