I know that you obviously don't pay much attention to country, but I suggest any serious fan of guitar check out each of these guitar virtuosos (with a sample from each to find):
Brad Paisley ("Play - The Guitar Album") -
http://amzn.com/B001D25M5W
Steve Warriner ("Guitar Laboratory") -
http://amzn.com/B004GOKBP0
Chet Atkins (Anything) -
http://amzn.com/B00005MP4X and
http://amzn.com/B003916HMW
Vince Gill (Anything, but currently "Bakersfield" and his all-original box set, "These Days") -
http://amzn.com/B00D7JGL36 and
http://amzn.com/B000HKDEN8.
Many people, even rockers, recognize Chet Atkins among the most influential guitar players of all time. Each of these played with him or honored him at one time on record.
So, I recommend all of them.
I'm not a fan of country, but your comment highlights how so much what is considered 'best' is so subjective.
How impressed one is with how it's played. And often overlooked, just how good something sounds - how enjoyable it is to listen to.
And another thing - how does it serve the song. A 'guitar hero' type might be invited (or at least be in a wish list) for one of Joe Satriani's G3 Concert tours. But with the possible exception of Jeff Beck, none will ever be wanted for a Steely Dan or Brian Wilson session or be asked to join Weather Report. But it doesn't mean that a player who 'shreds' automatically doesn't serve the song - if it is exactly what the song calls for (or is the reason for the songs existance).
Many say acoustic is harder to play than electric. How many rock guitarists can acquit themselves if they are handed an acoustic guitar and sheet music with Bach on it (or play Bach by ear if they don't read music)?
And people who play guitar (which isn't me - I can only play 6 notes assuming no strings are broken) have a different perspective.
But in the end everything is subjective, both to the listener as well as the player (some skills that aren't necessary for what the player wants to play may simply not be learned).
Personally my favorite guitar album is Anthony Phillips "Private Parts & Pieces" (the first one - he has 11 of them). Especially on tracks 'Field of Eternity', 'Tibetan Yak-Music' and 'Tregenna Afternoons'. Very little electric guitar on the album, mostly acoustic, much of it of the 12-string variety. It might not be the 'best playing', but it's the one that I find I enjoy the sound of the guitar the most.
The best electric guitar that I've heard is 'The Noonward Race' from the Mahavishnu Orchestra with John McLaughin on guitar (which is convenient since it also has my favorite drum performance as well). John McLaughlin, to me has to be a canidate for 'best' because as good as his electric guitar is on tracks like that, what I've heard from him on an acoustic is exquisite...