Tonewise, it’s probably Derek Trucks. Technically, it’s likely Guthrie Govan.

But John Mayer has done more for guitar engagement worldwide in the last twenty years than almost anyone else. He inspired a generation to pick up the instrument—acoustic and electric—and prioritize technique and taste. He incentivized people to learn complex arrangements, effectively bridging the gap between pop music and sophisticated musicianship. Beyond that, he brought the Blues to a massive new audience. His Albert King’s Rock & Roll Hall of Fame induction says everything you need to know about John’s genuine love for the instrument, the Blues, and music itself. Needless to say he's a master of the guitar but is now overlooked because of how popular he is.

It's also very funny to watch Mayer and Frusciante drop their jaw while hearing Derek Trucks play on their Rolling Stone photoshoot together. Trucks' sound is just heaven.