Can you name a person who was once in a band, but is better as a solo artist?
Other than Michael Jackson, I can't think of anyone whose solo career was more well received than when they were in a band/group.
Black Sabbath > Ozzy Osbourne
Cream > Eric Clapton
The Police > Sting
Creedence Clearwater Revival > John Fogerty
Genesis > Phil Collins
The Beatles > John Lennon/Paul McCartney/George Harrison/Ringo
Faces > Rod Stewart
Led Zeppelin > Robert Plant
The Velvet Underground > Lou Reed
The Stooges > Iggy Pop