For me, I have to first say: I play guitar myself so I can't be neutral on tthis topic.
In a ballad setting:
The Solo in the Live Album / Movie 'The Song Remains The Same' -
Stairway to Heaven - Led Zeppelin
Going over to latin tunes:
Samba Pa Ti - Santana
Going Blues:
BB KING - The Thrill is Gone
In the great field of a bit rouher rock... there is Satriana, then a bit of emoty soace and then some other greta guys, imho.
Check his out of this world solo in this cover of
Cortez the Killer
Yet - times rolls on, new talent arises!