First of all, IMHO the word "genius" is overused and has lost it's potency to some degree. I think all these guitarists are very talented(not know Dee Murray) and most choices are made on one's favourite artist(s) and genre(s) and on a regional basis. For example, on that list I would chose Alex Lifeson as Rush is on one of my fav bands and they're Canadian. No, I wouldn't consider him a genius. A very good guitarist, yes.