I agree with someone above, Les Paul, though he was a very good guitarist, should truly be called the "Inventor" of Rock and Roll. If he didn't invent the electric guitar, all the others still would have been playing acoustic folk or blues. But, my two votes whom to me, should be included or at least be a footnote to those mentioned, have to be David Gilmour and Chet Atkins. Pink Floyd should have been called the "David Gilmore band" for his unheralded solo's of which are so melodic and flowed within the parameters of the song and other instruments, sometimes you don't even realize the main ingredient is his guitar. And what can I say about the incredible Mr. Atkins. That man made his guitar sing like no other, just ask Mark Knoffler. If you ever get a chance to watch old footage of Chet playing with a band, you can't help notice the other musicians freaking out at times listening to what he's playing. Just my 2 cents.