Although it's only 2 levels in a collection of minigames, the platformer stages in Disney Adventures in the Magic Kingdom are pretty solid. It's Capcom, after all.
Bonk's Adventure. I've only played the PC Engine version, but if the NES port is faithful to the original, it should be worth a play.
Karnov is a little tough, but gives you unlimited continues.
The Wizards and Warriors trilogy is fun, and the second one stars Fabio as Kuros.
GBC,GBA,GBA SP,NDS,NGPC,Panasonic FZ-10 3DO,NES,Sega Nomad,Sega CDX w/Power Base Converter,PS1,PS2,PS3,Saturn,Dreamcast,PC (Win 98, XP, 7),Dingoo A320,Dingoo A330,Gemei A330,LetCool N350JP,PAP-GAMETA,GCW-Zero SE,Kyocera Rise,2DS,GP2X-F100,GPD G7,JXD 100,JXD A1000,JXD A3300,JXD F3000,JXD V5000,JXD S7300B,Hyperkin SupaBoy
Currently playing: Theatrhythm Final Fantasy Curtain Call (2DS)