R.E.M.

This Athens band's initial mix of Velvet Underground strum, Byrds-like Rickenbacker jangle, and charismatically oblique singing, became the sound of the 1980s as legions of bands followed suit. But even as imitators codified R.E.M.'s approach into the money-making "alternative rock" sound, the group refused to stand still, constantly changing and developing without ever abandoning their underground principles. Somehow they became superstars along the way, but it's never affected their commitment to their music. In 1997, drummer Bill Berry left the band, but Michael Stipe, Peter Buck, and Mike Mills soldiered on in his absence.