Black Zero & Superboy Prime run the gauntlet
They are very powerful
Black Zero- http://www.spider-bob.com/villains/dc/BlackZero.htm
&
Superboy Prime- http://en.wikipedia.org/wiki/Superboy_Prime
1.1st Age Spawn,Ghost Rider & Hellboy
2.Venom,Carnage,Toxin & Doppleganger
3.Vision,Invisible Woman,Wonder Woman
4.Wonder Man(Energy version),Atlas,Thing & Blob
5.Immotal Hercules,Classic Juggernaut & Darkness
6.Thor & Beta Ray Bill
7.Gladiator,Sinister Squadron Hyperion,Terrax
8.Uber Peaved Silver Surfer
9.Morg with WOL
10.Thanos
11.Depowered Tyrant
12.Ego