That's the book on neo-classical metal closed right there. Did anyone contribute anything else to the genre after this? Yngwie was god. Shame he became a clown.
Jason Becker and Marty Friedman. Becker especially with his solo album, but they also released two albums as Cacophony. Their singer was pretty shit, but the guitar.... oooooh the guitar.
I had high hopes for Cacophany but as soon as the vocals came in there was nothing worth listening to. Great players though, and I have most of their output.
I'm not sure Jason added anything to what Yngwie had brought, but he certainly upped the ante. Apart from the loss to him and his family, it's awful to think of the music we've been denied because of his disease.
I accept that Marty brought that oriental scale stuff to the party. I love his playing more when he stops being metal but he is one of the greats. I have an album of his with Hawaii on vinyl, before the shredder stuff.