And I'm not talking about re-mastered, orchestrated, or any of that. I'm talking about straight from the NES soundtracks.
The only ones I can think of right now (probably because I'm listening to them right now) are the Level One (Forest) Theme from Blaster Master, and Protoman's song at the end of Megaman 3. About the latter one, a full track of the song was on the cart, but got cut off by the end credits. It gets even better after the cut-off.