Richard Thompson, for sure.
It’s an acquired taste, but he continues to amaze with a new style every year.
http://www.richardthompson-music.com/gearandtunings.asp
I discovered Richard Thompson a few years ago. He’s great but no one knows about him. My favorite album of his is Mock Tudor and my favorite solo is the one in the song Hard On Me. So unorthodox. Where in the world did he get his style? He is so not about the pentatonic box it’s not even funny. Occasionally he sounds a little like a very dexterous Neil Young but for the most part he is resolutely his own thing.