1 - Green Lantern (Stewart)
2 - Superman
3 - Batman
4 - Wonder Woman
5 - Flash
6 - Iron Man(Lex Luthor)
7 - Hulk (Damage)
8 - Spiderman(Sideways)
9 - Wolverine(Timberwolf)
10 - Mera
11 - Jean Grey(Saturn Girl)
12. Black Widow( The Silencer)
I think I am only one who is going to approach the question this way. The Perfect Justice League team my mind went to getting the best heroes regardless of universe so I was not thinking Classic DC JLA rosters.