Kirk Hammet is pretty tasteless.The guy from Anthrax wasn't all that.Tom Morello I like his band Audioslave now but his solos I never liked.And IMO Dimebag Darrels tone is god awfull most of the time.
As far as the eruption thing goes thats not a guitar solo its a solo spot."Its just a bunch of techniques"thats what its sposed to be!!Its his highlight spot!!In 1978 you name somebody else who could play like that it certainly wasn't Randy Bachman.
Lets talk underated guitar players:
I vote for the guy in the Cars and the lead guitarist from Heart.