Eric Johnson's first album "Tones" has a quasi classical piece, "Desert Song".
Manuel Barrueco did an album called "Nylon and Steel" which is a series of duets with Al Di meola, Steve Morse, and Andy Summers.
Led Zeppelin's "All of my love" has a nylon string solo, not really classical.
Steve Howe of Yes did "Mood for a Day" on the "Fragile" record, to many of my generation it was our introduction to classical guitar.
That's all I can think of off the top of my head, but I am sure there are many more.