Great Jazz guitars players you should not miss out:
Pat Metheny
Joe Pass (if you can, get Joe and Ella)
Wes
There are many many more! Meola, Paco, Django, John Mclaughlin, etc. I wondered how no one mentioned metheny but I guess people here don't like him much :-)
I don't know what makes guitar players so unique but I guess when you get to a point when someone hears a player play 10 sec and you know who is playing, that normally indicates that you are listening to a player with an unique vocabulary. That happens with all the great players. I can listen to a bootleg from Joe, Metheny, Wes, etc and I will immediatly know who is playing. Also, another great thing great players have is that they normally play with lots of different musicians and in quite different styles.
It's quite normal not to like several artists when playing differently, either solo or in an ensemble. For example, take Metheny. He has worked on so many different projects with an enormous ammount of musicians that almost no one will like all of his work. Not many like Song X or Zero Tolerance for Silence for example. wesbed, try to hear Joe in an ensemble and see how he stands out, or simply delight yourself with Joe and Ella... can't get much better than that.
ps: for a classical virtuoso, check out Andreas Segovia.
All the best,
BA