necrophagist, high rise, black flag, the amboy dukes/ted nugent, slayer, etc. surprised nobody has mentioned wayne rogers, and maybe this clip might not be fast enough to count as shredding but still, it's fucking awesome, there's something overwhelming about seeing such an unlikely looking dude letting rip in a way that most people can only dream of, he really gets going at the 1.35 mark
http://www.youtube.com/watch?v=USb2YH3eeK8