Joe Satriani was the guitar teacher of a lot of famous guitarists:
"His students included Steve Vai, Kirk Hammett of Metallica, David Bryson of Counting Crows, Kevin Cadogan from Third Eye Blind, Larry LaLonde of Primus and Possessed, Alex Skolnick of Testament, Rick Hunolt (ex-Exodus), Phil Kettner of Lȧȧz Rockit, Geoff Tyson of T-Ride, Charlie Hunter and David Turin."
I hadn't heard of Charlie Hunter before, but he appears to be quite talented. Apparently, he's known for playing custom guitars with 7 or 8 strings, with simultaneous guitar and a bass parts.
This is the first video I pulled up on YouTube:
https://youtu.be/La2gmwSQJo0?t=83
Check out the fret arrangement on his guitar.
"His students included Steve Vai, Kirk Hammett of Metallica, David Bryson of Counting Crows, Kevin Cadogan from Third Eye Blind, Larry LaLonde of Primus and Possessed, Alex Skolnick of Testament, Rick Hunolt (ex-Exodus), Phil Kettner of Lȧȧz Rockit, Geoff Tyson of T-Ride, Charlie Hunter and David Turin."
https://en.wikipedia.org/wiki/Joe_Satriani