One of the greatest American blues rock guitarists was Johnny Winter. Johnny's career suffered many ups and downs due to substance abuse and poor health, but in his prime he was a force of nature and was doing very well in the years right before his death. Johnny was so well regarded that he played at Woodstock in the evening, one of the prime slots. He has plenty of good records, I suggest Still Alive and Well, Second Winter, and Johnny Winter Live! He was mainly known for his intense vocals and in your face guitar playing, usually playing a Gibson Firebird.