Ok, bands definiately better than GnR
Grateful Dead
Van Halen
Pearl Jam (if for no other reason than
@Tremendous Upside so no arguing on this one otherwise maybe they go below)
Nirvana
Lynard Skynard
Credence Clearwater Revival
Metallica
Aerosmith
Allman Brothers
The Doors (although I can't stand them)
The Jimi Hendrix Experience
Bruce and the E Street Band
Crosby Still Nash (& Young)
Beastie Boys
Beach Boys
Tom Petty and the Heartbreakers
Prince and the Revolution
(if we want individuals not fully associated with a band add Elvis, Chuck Berry, Johnny Cash, Billy Joel, Ray Charles and if we take the title literally not to cover just rock, a couple dozen jazz, big band, country acts and other 'bands' to throw in)
Probably Better
Eagles
Red Hot Chili Peppers
Bon Jovi ( :X , but hard to deny their impact)
Steely Dan
The Supremes
Run DMC
The Temptations
Probably mossing a few and any number could be argued in the second group as this is just at first blush.
So, even mlre confidently than before... No. Not even top ten rock acts as demonstrated above,