Just going to release my list:
Bomber Raid
Choplifter
Enduro Racer
Global Defense
Golden Axe Warrior
Line of Fire
Kenseiden
Castle of Illusion (Mickey Mouse)
Land of Illusion (Mickey Mouse)
Legend of Illusion (Mickey Mouse) [Skip these three if you didn't like or weren't overly excited by the Genesis games.]
Ninja Gaiden
Paperboy [Best version of this game on a console.]
Penguin Land
Phantasy Star
Power Strike
Power Strike II
Psycho Fox
Quartet
Scramble Spirits
Shinobi
Sonic Chaos
Sonic the Hedgehog
Sonic the Hedgehog 2
Thunder Blade
Wonder Boy in Dragon’s Trap
Zillion
A number of these, and others on other people's lists, are actually PAL games that were just capable of running on a NTSC system. Sonic the Hedgehog comes to mind. The only difference was the box (US had a sticker), otherwise the game is the same and was optimized for PAL consoles, not US ones.