I propose a three-way tie between Jimi Hendrix, Stevie Ray Vaughan and Kenny Wayne Shepherd for their respective versions of "Voodoo Child." All fantastic in their own right.

Steve Earle, Kris Kristofferson, Todd Snider, James McMurtry, Ray Wylie Hubbard, and the Drive-By Truckers are all fairly far-left artists that could be considered country.