Here are some of my choices for CONSOLE ports. Some seemed to have thrown in Computer ports when answering, which is a whole different league. Also self-published/homebrews/hacks I am excluding from consideration.
Berzerk Atari 5200 BluePrint Atari 5200 Bump'N'Jump ColecoVision Burgertime ColecoVision (Pre and Post crash) Carnival ColecoVision Centipede Atari 7800 (5200 runs an extremely close second, IMHO) Choplifter! SMS Commando Atari 7800 (Yes, even better than the NES) Defender Atari 5200 Dig Dug Atari 7800 (Famicom runs a close second post crash) Donkey Kong NES (ColecoVision if pre crash) Donkey Kong Jr NES (Colecovision if pre crash) Double Dragon SMS (Closest to Arcade / NES is my personal fav Until the Genesis port) Elevator Action NES Frenzy ColecoVision Frogger Atari 2600 Starpath Supercharger (Until the Genesis port) Galaga NES Galaxian ColecoVision Gorf ColecoVision Joust Atari 7800 Jungle Hunt ColecoVision Kangaroo Atari 5200 Moon Patrol ColecoVIsion Mouse Trap ColecoVision Mr. Do ColecoVision (Until the SNES port) Mr. Do's Castle ColecoVision Ms. Pac-Man Atari 7800 (5200 runs a very close second) Pac-Man Atari 5200 Popeye NES (ColecoVision runs second or first pre crash) Q-bert ColecoVision Robotron 2084 Atari 7800 Tutankham Colecovision Venture ColecoVision Wizard of Wor Atari 5200 Zaxxon ColecoVision