You have one of the few best games that the Jag has to offer, Tempest 2000.
I would suggest to add,
Rayman
Defender 2000
Raiden
Zool
Iron Soldier
The following is a matter of your own personal gaming taste,
Pitfall
Super Burnout
Cybermorph
Val d'Isere Skiing and Snowboarding
Bubsy
I sort-of like all of these games, but I know that some of these games are not just anyone's "cup of tea." If you know what I mean. Tempest, Defender, Rayman, Zool, Raiden, Super Burnout, and Pitfall are my favorites on the Jag with Tempest being at the top of that list. The others that I listed here fall somewhere under that. I have more games than this but there are some of those I would just not recommend, like Checkered Flag for example, pure trash. Many of the games on the Jag has a 16-bit feel to them, to me.
Themepark might be a good one, I don't have it, but I have read about it.
Doom is another one that I have heard is good.