There aren't many real guitar innovators left these days. Tom Morello may be the last of them. Here is one of his signature performances, a cover of Springsteen's "The Ghost of Tom Joad". The awesome solo begins around 4:50.
http://www.youtube.com/v/6yL-jU2nt_kThe was (and still is) debate whether a Roger Waters-less Pink Floyd should even call themselves "Pink Floyd" at all. In fact, Richard Wright, who returned to the band for "A Momentary Lapse of Reason" even called the album "essentially a David Gilmour solo record". Whatever the case, "On The Turning Away" remains one of my favorite songs of all time. Gilmour never wowed you with his speed or theatrics, but no one put more expression into their sound. The solo at the end of this one typifies his style.
http://www.youtube.com/v/8UhSAG2ULT8SRV in his prime. I've posted this one before, but I'm posting again because it remains the most incredible solo I've ever seen. Straight up guitar porn.
http://www.youtube.com/v/tWLw7nozO_UUp next: Piano.