Unless you're a guitar nut, like me, these 3 guys are most likely not household names.  But they are some of my guitar heroes, and they deserve way more attention than they get.  Click these YouTube links and give them a few minutes if you have time.

Greg Koch (if you're in a hurry, the pyrotechnics start at 2:43)

Guthrie Trapp (one of Nashville's best and most versatile players)

Steffen Schackinger (he's from Denmark, but man, he sure is down with that Celtic sound!)