Okay, this is certainly not 12 bar blues but I consider it to be blues-based as is much of the playing by Robben Ford. Isaiah Sharkey is incredible and his 5 minute solo on John Mayer's "If I Ever Get Around to Living" is some of the best guitar playing that I've heard in a long time.
"John Mayer - If I Ever Get Around to Living - Hollywood Casino - Tinley Park, IL - Sept 2, 2017 LIVE"
Watch "Isaiah Sharkey Trio at Winter JazzFest 2017" on YouTube
Watch "Isaiah Sharkey Teaches Piano-Like Blues Riffs on Guitar | Reverb Tips and Tricks" on YouTube
Watch "Isaiah Sharkey on D'Angelo's "Till It's Done" | Reverb Tips and Tricks" on YouTube