Beatles
Eagles
Stones
Skynard
Allman Bros
Floyd
Byrds
On your list: the Byrds.
I should have included them. Never got to see them or the Electric Flag. Overflowing with talent.
Incredibly, the Columbia Records bosses were afraid of the risk in their new album contract for the Byrds, fearing they might not be musically talented enough as unknowns. They had the reliable (unknown) session musician Leon Russell do a lot of the first album work without being credited. A group with David Crosby, Roger McGuinn, et al.