Originally Posted by Danny_C

If there's a single best all-around guitar player, it's Al DiMeola.

People also mentioned John McLaughlin and Paco de Lucia... I'd rank them up there, and in fact, there are a couple of albums by what's called the "Guitar Trio" that are probably the absolute pinnacle of amazing guitar collaborations, and the trio is Al DiMeola, Paco de Lucia, and John McLaughlin.