DeMartini stood apart from the poodle-haired shredder crowd with his gutsy, bluesy lead style. For evidence of that, check his wailing leads on "Way Cool Jr.". But, Warren was no one-trick pony. He could shred with the best of them. Listen to his blazing solos on "Round and Round" or "You're in Love" for proof.
DeMartini rocked out with Ratt until the band's break-up in 1992, then served short stints in Dokken and Whitesnake. He also put out a couple of solo records. He briefly played with Dio before leaving due to musical difference with Ronnie James Dio. He returned to Ratt in 2007 .
For the best taste of Warren DeMartini's skills, I recommend searching for Out of the Cellar or Invasion of Your Privacy. The man wails with guts and soul that few guitarists possess and he may well be one of the most underrated rock axemen of all time.
Dokken is where Lynch's talent really bloomed. Lynch wrote some of the most iconic riffs of the 80's metal era. Stuff like "Tooth and Nail", "It's Not Love", "In My Dreams", and "Heaven Sent" has Lynch's finger prints all over it. His soloing fused graceful speed with a tasty sense of melody. He also employed a wide vibrato that shakes the soul.
Lynch is also the first player to show me that how you sound is as important as the notes you play. Lynch's tone is downright scary. He also was very skilled in employing harmonics in his playing. Put it together, and you've got a tangy hard rock mixture with a bit of a bite.
For Lynch's best work, I'd recommend anything from the Under Lock and Key record. Lynch's signature tone and riffage is in fine form there, and his soloing was never better.
Bettencourt came to the forefront with Extreme. Though they hit the big time with acoustic hits like "More Than Words" and "Hole-Hearted", Nuno's skills are best displayed on tracks like "Mutha (Don't Wanna Go to School Today)", "Warheads", and "When I'm President". That's "Play with Me" playing over top of the mall chase sequence in Bill & Ted's Excellent Adventure.
If you want to hear Nuno's best work, try Extreme's second record, Pornographitti. And Three Sides to Every Story shows the range and scope of his skills. Nuno even wrote the score for the movie Smart People. As I said, the guy can do anything, but his stuff with Extreme is what I like the best.
Warren DeMartini, George Lynch, and Nuno Bettencourt all wrote and played stuff that made me wanna pick up a guitar. For me, these three dudes legitimized a whole decade full of silly, loud, big-haired rock. If you want to hear some excellent guitar playing, do yourself a favor and find some music by these three dudes.