NO first party franchises, too easy to list.
The crappiest thread got me thinking, what about systems considered the lesser or loser of a generation that had some really awesome games. They can be big sellers or largely ignored, or even sadly relegated to a stupid rental. But if it's N64 or Virtual boy -- No Mario/Wario, Zelda, Sega with Sonic, etc. I think secondary franchises not bound to a system (your Konami, Hudson, Capcom, etc favorites) are fine as much as are obscure games too. Maybe someone will look up an oddball they missed and enjoy it.
Dreamcast you could throw one out there like Record of the Lodoss War, awesome if you love the manga/anime, still great if you're into a Diablo type game on a console with a good story that keeps you engaged and a character with lots of customization in upgrades and gear. With the N64 something like Mystical Ninja Starring Goemon, an Ocarina of Time style of game with goofy Edo era Japan shenanigans going on and actually is far more fun to play too.