There is or will never be a "Correct" list. Everybody (not only guitar geeks like us) has a say in this and therefor will each provide different poll results! :)
By the way, no one can put anything Steve Vai's ever done next to what Kurt Cobain has done. Different era, different audience. Kurt has a simple catchy song structure (very well put together) where Steve Vai is a technical "all over the place" kind of guy. Cobain's musical structure was easy listening, Vais' by any means, is not. If Cobain were alive today he'd laugh. He never intended to be a guitar player hero.
To some people, Malmsteen is the enemy where as Randy Rhoads or Ritchie Blackmore are Gods! All three are neo-classical players, but a lot of people see Yngwie's playing as more "over the top" than Rhoads or Blackmore. That's because unlike Yngwie, they are more basically structured to play rock in a way thats easier to follow.
Hell, why do you think Kiss booted Vinnie Vincent for someone more like Ace Frehley? EXACTLY!
Just preference.
