Super Mario World
Legend of Zelda: Link to the Past
Zombies Ate My Neighbors is alright
Donkey Kong Country
Secret of Mana
Seiken Densetsu 3 if you can read Japanese. If not, get an emulator and play this game.
Super Play Action Football is a pretty good game if you're into that. You can pick from high school, college, or the pro level. College teams aren't licensed, but the NFL teams are.
I always enjoyed playing WWF Royal Rumble.