They're known as the founding fathers of Southern rock, but the Allman Brothers were actually much more progressive than the musical school they inspired. They reclaimed the US-influenced blues-rock of Cream et al. and brought it back to America, adding country and jazz touches. They were noted for their improvisatory skills, particularly the inspired dual-guitar work of Dickey Betts and the late Duane Allman. Even after the deaths of Duane and original bassist Berry Oakey and the departure of Betts, the band soldiered on strongly into the 21st century, led by founding singer/organist Gregg Allman.