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

The only "American" band (North American, that is) I would consider isn't from the US, but from Canada, and that would be Rush. No BS, pure music and intellect, those guys gave everything to their fans for 40+ years. They would go on but physical demands exceed the needs of the bodies. And expecially to Neil Peart, who lost his only child and wife within one year, eventually found a way to get back into it. That's true strength. Their last album, Clockwork Angels, is one of the finest rock albums ever.

Yes, CCR is a great choice. I'm also thinking Beach Boys and Eagles.

Gotta say The Eagles. Their concerts are like a camp fire sing along. Oh yeah The Eagles can rock with the best of them, Joe Walsh is so underrated and everyone  else can bring it all night long too.

Since The Band were 4/5’s Canadian, and Rockpile English/Welsh (and played American Rock & Roll at least as well as any band of which I am aware), I’d say NRBQ. But then I don’t consider The Eagles a Rock & Roll Band. Rush can be called many things, but a Rock & Roll band is not one of them. Am I being too literal? The Beach Boys output was great, but that’s because of Brian Wilson’s songwriting and vocal arrangements, not because they were a good band. As a band they were pretty weak. Yet when they toured with The Dead they mopped the floor with them. The Dead also weren’t a Rock & Roll band.