Eruption that MF suggested - teh opening chord is a straight steal from Jailbreak. Most of it sounds like Yes from the mid 70s to me ( although that was keyboard)
There are only so many chords TJ. 12 for most root/5th/root power chords. Going to sounda bit like something 1 chord isn't it? It's an A if I remember right (but guitar tuned down a half step) which is the same as Pop Song '89 (REM) but that's about where the similarity ends.
It sounds like a keyboard but was all played on guitar. No one else was doing anything like it.
guys, really, even I can do passable van Halen guitar wanking. most of it is just a bunch of arpeggios and scales, with a bit of bach thrown in every now and again. it's intricate, but technically it's not *that* hard. It's showing off.
It's pretty easy to copy most guitarist styles. It's pretty difficult to reinvent the way an instrument is played and more or less drive a whole musical genre for the next few years. I reckon I sound like Hendrix after a couple of pints, doubt many would agree 
I'm not even that big a fan (that was SHOCKING grum) but to suggest he wasn't a massive musical influence is allowing personal taste / prejudice to rule over fact.
(JOKE)
