Which band IS really America's Greatest (rock & roll band)?

jdub, I based my info off wikipedia...which is never wrong. ;-) Not sure if your source or wikipedia is worldwide sales or just US. For what its worth the highest ranking Eagles album is a 'best of' collection....according to wikipedia...which is never wrong...

jdub, Fleetwood Mac is of mixed national origin. 

bdp24, I agree with you. The Band is an American band. Four Canadians doesn't change that a bit in my book.

The Grateful Dead, no question. You may not like their music but as far as success, legions of fans following them around the country year after year, the number of concerts performed, years together, earnings, subject matter and lyrics being solely focused on Americana, the old west and the American psychedelic revolution, they’re in a league of their own. We can end the discussion now :) just kidding, of course.

One more vote for NRBQ. And I would add that the current incarnation is also excellent. No qualifications.

@sunnyd, thanks for the reminder. I haven't heard the new NRBQ lineup, of which only pianist Terry Adams remains from the original members. Drummer Tom Ardolino passed away a few years ago, bassist Joey Spampinato (a great one, one of my all-time faves. Keith Richards agrees, hiring him for the band in his Chuck Berry documentary) is in treatment for Cancer, and guitarist Al Anderson moved to Nashville and is now a full time songwriter. My comment above referred to the period when Joey's brother Johnny took Al's place on guitar. Johnny's okay, but he's no Al Anderson!