I made a Genesis top 15 recently, so this should fit well. I really wish all 15 could count on the list though, numbers 11 to 15 are amazing games which deserve it!
1. Sonic 3 & Knuckles
2. Sonic the Hedgehog 2
3. Sonic the Hedgehog
4. Mega Turrican
5. Outrun 2019
6. Aladdin
7. Adventures of Batman & Robin
8. Landstalker: The Treasures of King Nole
9. Streets of Rage 2
10. Lightening Force: Quest for the Darkstar
Honorable Mentions:
11. Shadow Dancer: The Secret of Shinobi
12. Ranger-X
13. Contra: Hard Corps
14. Vectorman
15. Golden Axe
This is probably about right, but I really want to put Golden Axe above Streets of Rage 2; yeah, objectively SoR2 is far more advanced, but I have always really loved Golden Axe; it's one of my favorite arcade games, and the Genesis version is great. I love Golden Axe, it really is top 10 material... but more than 10 games for the Genesis are (and more than 15 are too!), so it's hard to choose which to include.