Currently Online 
1. The Legend of Zelda (NES) - Simply the most groundbreaking game ever made at the time of its release, made even better with the inclusion of the second quest. Whereas some great classics, such as SMB and Metroid, had very welcome improvements made regarding play control or hit detection, the original Zelda still plays flawlessly today.
2. A Link to the Past (SNES) - A close second to original, it has aged beautifully and can swap places with #1 depending on how I critique them.
After this it's much more difficult to list them. Ocarina would probably get my vote for third, with BOTW and Majora's Mask pretty much tied for 4th. And Wind Waker would be next; even higher, in fact, if only it felt more complete.
Regarding BOTW2, I hope that it has more traditional Zelda dungeons. That was the main problem I had with the first - the Divine Beasts and Hyrule Castle all felt lacking compared to dungeons and temples in earlier installments.
