Here's a couple of examples of what I'm asking about:
Rabbit in the Moon is an electronic music group, but this piece is almost exclusively piano and is one of the most beautiful pieces of music I've ever heard. Part One: https://www.youtube.com/watch?v=yzdZpvph_yw&playnext=1&#... Part Two:https://www.youtube.com/watch?v=vFlUzvrHD2s&playnext=1&#...
I'm not a fan of the Goo Goo Dolls or Limp Bizkit, but Fred Durst joined the Goo Goo Dolls to do an exceptional cover of Pink Floyd's Wish You Were Here. https://www.youtube.com/watch?v=3vYaq9ZzyT4