Vai's, Yngwie's, Paul Gilbert's tones are NOT venerated. They hardly ever get mentioned. You hardly ever have people saying like "I want to get his tone"...
So...
To answer the question...
1. EVH's - I never liked his tone. And I will not ever wish to be able to nail that "brown sound". Yes, it's distinctive and all, but I hate it!
2. Satriani's - Good live tone, nothing stellar. But I never liked his (varied) tone in his studio albums. I have to note though that the tone for his "Crystal Planet" album is to me, his best.
3. Dimebag's - Your typical "scooped" sound, aka Angry swarm of bees. Never liked it. I could never understand why all these kids wants to nail that tone.
George Lynch's and Warren DeMartini's are what I call THE 80's tone. I love them.
And yes, I also love Yngwie's tone.
Most underrated tone: Blues Saraceno's.
Holy Grail tone: Slash's lead tone, Zakk Wylde's "No More Tears" rhythm tone.