Donkey Kong Country's music is a good example of FM-synthesis sounding like real life instruments being recorded.
I recently discovered the music of Japanese turn-based strategy RPG Energy Breaker, some tracks (not all of them) are mind-blowing.
You can either go listen to the game ripped track at my soundcloud (game is not so obscure but a lot of its [even best] tracks are not on YouTube yet): http://soundcloud.com/devouringone3/r3edl7l
Or take this enhanced and live instruments recorded remix, partly performed by the original composer, for the release of the OST in 2006:
I said "enhanced" but if you go listen to the SNES version you'll find it sounds almost the same.
It's (principally) by Yukio Nakajima one of the two composers who made soundtrack for Lufia II: Rise of the Sinistrals. Official soundtrack for these games got released only recently in the Game Legend Trio (Lufia 2, Chaos Seed and Energy Breaker, because they all share the same composers). That trio of game is an exceptional one, but since very much all of the three got released a bit before, meanwhile, and a bit after the release of the N64, not too many were interested in buying/playing the game at the time.
My favorite SNES soundtracks are from the games (will put in grey those which were already cited):
-- the Megaman Xs
-- Tetris Attack
-- Both Super Mario Worlds
-- the first two Donkey Kong Country
-- Super Bomberman 2 (and a few tracks from the later ones, the FM is one of the best made that was for the SNES)
-- Super Mario RPG
-- Zelda: A Link to the Past
-- Lufia 1 and 2
-- B.O.B. (amazing futuristic, robot city themes, as well as organic caves and volcano themes on this obscure gem)
-- Kirby Super Star
-- Pocky & Rocky 1
-- Sparkster (amazing stuff in this Konami proprietary only SNES-title franchise's, very adventure-like: http://www.youtube.com/watch?v=NXhg9uP43M8)
-- Super Metroid has some very nice ambiance to it but it doesn't sound like your typical SNES game, lol. As a kid I rented the game and played it before going to bed, of course I got stuck at the gold statue but I had nightmares during the night, the music helped causing this. I've returned the game and never played it again until I reach 14 years old (was 6-7, am 22 now).
-- Stunt Race FX (that I prefer to Super Mario Kart for the most part)
But I always recommend playing the game instead of just listening to its music. It's hard to find the time though
Edited by devouringone3 - 5/10/12 at 10:50pm