No one said The Grateful Dead. On VH1 it said that they have performed in front of more people than any other band ever and they only had 1 top ten hit.

Also Allman Brothers Band. I think it was time magazine (or some other magazine...maybe rolling stone) had top 100 guitarists of all time. The ABB had three of them.

At one time Fleetwood Mac was incredibly popular. It was said that when you bought a home in the suburbs you were given a Fleetwood album. ha ha.