This is absolutely insane. Modern metal has been pushing so many boundaries since its such a hard genre to get into. Some obscenely amazing guitarists have emerged in the last decade.
https://www.youtube.com/watch?v=y275DyRjfjE&list=PLThcv0otcW...
And 15 years? Dream Theater has been around for 20 years (with modern lineup), and nobody in their right minds would not put John Petrucci at the top of any guitarist list