I recall the Pixies.
That was right from a small age when they came out I decided I love seventies and eighties rock.
While the music scene was getting MTV'd out, there was those acts more toward the underground.
I also recall a part grunge, rock folk act called The Posies.
They actually sounded better to me with fewer instruments and production. Ken Stringfellow and John Auer could seemingly play anything on guitar and reminded me a lot of Simon & Garfunkel with their singing. I think Failure (Their first album) was their best.
I listed metal guitarists that were underappreciated.
But I could definately list more.

Matt

http://www.f3music.com/444