Most of the best and most legendary songs in rock history weren’t made by wunderkind instrumentalist wizards and divinely gifted singers, but rather by average-to-good musicians whose sum of combined parts (unsure about grammar/syntax here) where greater their individual talents. That’s when magic happens. There are exceptions.
I’ll admit, though, that this solo by Zakk Wylde is pretty hairy.
Edit: On second thought it is pretty much just noise. While he certainly can play guitar I find his repertoire to be limited. Definitely not top tier. But he does have the sound that Ozzy needs.