The Greatest Rock and Roll Band ever is .... Led Zeppelin!
The original Heavy Metal with a healthy dose of R&B.
I should point out that I was a HUGE Aerosmith fan, and Stones fan, back in the '70s. While I still enjoy Aerosmith, they just don't have that edge or amazing sound they did back then. Most of their stuff just sounds the same now, very formulated.
The Stones hit a few low spots, creatively, but they have been consistently great over all these many, many years.