In no particular order:
Pete Townshend - This guy is to guitar what Jim Steinman is to piano. Thunderous power chords, and a fervent style of playing, though whilst not the most technical, has an amazing effect on the listener. And I've ben lucky enough to see The Who a few times now.
Brian May - The most instantly recognisable sound of any guitarist. Rightly lauded as one of the world's greatest, in my opinion.
George Harrison - I don't suppose I need to say much about this choice!
Prince - Seriously awesome. Should rank much higher in this sort of poll in my opinion. Saw him perform at the O2 Arena a few years back, and was absolutely blown away by his musicianship!
David Gilmour - Again, not much that needs saying.
Chuck Berry - If it wasn't for this guy... etc etc
Mark Knoplfler - Again, seems like an obvious choice, but rightly so in my opinion.
Eric Clapton - As above.
Joe Perry - Was fortunate enough to see him live last year when he was support to Bad Company. Very very good. Also helps that I'm a huge Aerosmith fan too, of course!
Albert Lee - Again, another I've been fortunate enough to see live, this time as part of Bill Wyman's Rhythm Kings. Incredible talent.
Joe Walsh - In my opinion, his joining the Eagles was a masterstroke. Life In The Fast Lane is one of my all-time favourite songs, and without Joe's guitar who knows what it might have been? Life's Been Good, In The City, Pretty Maids all in a Row. The 'duel' with Don Felder at the end of Hotel California is sublime. And yes, I've seen him live too (as part of The Eagles)
Gary Moore - Even if just for Parisienne Walkways and Still Got the Blues!
I'm sure I'll think of about twenty more once I click 'submit reply'
edit: here's a couple...
Slash - Sweet Child O' Mine has been my ringtone since phones first had the capacity to use sound files. It's still one of THE best intros to a song EVER, in my opinion. Anything from Appetite or Use Your Illusion 1/2 is head and shoulders above anything else in their genre.
Robert Johnson - same reason as Chuck Berry
edit 2: and a couple more...
Jimi Hendrix - Electrifying
Jimmy Page - Self explanatory, really
