If this poll was for the greatest technical guitarist, then yes Saatch and Vai would be top of the heap. Its not though. It's for the best guitarist. The best can mean many different things to different people, in the end it'll just come down to what people enjoy listening to the most. Incidently EVH, Vai and Saatch have sited May as their guitar god and major influence (Saatch even built Bri a custom made guitar. Can be heard on his solo record "Back to the Light"). EVH played on Bri's "Starfleet" record. While both Vai and Saatch jumped at the chance to play with their hero on the "Guitar legends in Seville concert". Meanwhile May has stated on numerous times that these guys have taken the guitar to a new level, and technically can do things he cant. So theres a mutual respect there.
For mine, Saatch and Vai's (excellent guitarists they may be) start to bore me after a while. I much prefer guys like May, Page, Slash, Gilmour and co, who create legendary riffs and solo's to complement both the great songs they wrote, and the legendary ensembles they were part of. It's that creativity (not necessarily technicality) that imo leaves Vai, Saatch and other instrumentalists forever staring up at them. But that's just me. Each to their own.