This probably doesn't count because she isn't a recording artist and just does covers but some of the best chops I have seen. She has taken a lot of videos down but still has some good ones up - and its good old school hard rock.
Current list of favorite modern living guitarists: John Scofield (with Medeski, Martin, & Wood) John Mayer (killing it with Dead and Co) Marcus King (what a refreshing new kid!) Keller Williams (king o one man loop show) Eddie Roberts (The New Mastersounds) Honorable mention for Gary Clark, Jr!