Slash - not hair metal, in some ways GNR signified the death of hair metal
Mick Mars - BLECH
Vinnie Vincent - BLECH
Vitto Bratta - ouch, what? White Lion? Come on man...
nuno bettencourt - brilliant guitar player, HORRIBLE band
Vai - finally, you have a hit
Vivian Campbell - ahem, Vivian Campbell has a Dio number of ONE
If I were to make a list of some of my favorites from that era:
Marty Friedman - love his solo stuff, Megadeth with him will always be my favorite lineup
Alex Skolnick
Yngwie Malmsteen - I know, I know. Enormous dickhead. Call it a guilty pleasure
Joe Satriani - the best I've ever seen or heard, his guitar work in many ways transcends the guitar