Found a really intersting post in a forum regarding 101 unsung guitar heroes. I am unfamiliar with most, although I recognise many of their collaborations and connections as discussed by the author in the text.
Gonna copy the link right now so I don't forget again!
http://www.guitarzone.com/forum/index.php?showtopic=182755
Some of these guys are serious dudes; eg.
Guitar Slim
He paid hookers by the week, drank mineral oil to “lubricate” his voice, dyed his hair blue, and performed with a 150' guitar cable in the ’50s—often while riding on the shoulders of Johnny “Guitar” Watson.
Some of those who I am familiar with are Robbie Blunt, Tommy Bolin and Mike Oldfield. Even our own RSA Ray Phiri gets a mention via his seminal contributions to Simon's Graceland record.
PS: If you don't know Robbie Blunt, check out his work with Robert Plant here (click on "listen to samples' tab on the page, and click on 'Big Log' and 'In the mood" when the media page opens). Great tone and clean style IMO.
http://music.barnesandnoble.com/Principle-of-Moments/Robert-Plant/e/081227415921/?itm=4
I've noticed some of you have eclectic tastes and encyclopedic players' knowledge, so see who else you recognise ...
Riaan C