1. General Zod
2. Starro
3. Doctor Sivana
4. Ocean Master
5. Doomsday
6. The Butterflies
7. Black Manta
8. Steppenwolf
9. OMAC
10. Dark Flash
11. Sabbac
12. Black Mask
13. Cheetah
14. Kalypso
15. Enchantress
16. Ares

Keeping with the rules I established for my Marvel list, I only chose one villain per film or show. Steppenwolf ranks at No. 8 primarily for the Snyder Cut, he would rank lower without factoring that in and only going by the original Justice League.