I doubt Vulcan and Mimic could win. Vulcan only managed a double k.o. against Blackbolt and was badly injured by Polaris, both of whom are less powerful than any of the Z warriors listed. He also was overpowered by a sun dipped Havok and lost a battle against Gladiator. And don't forget that Janemba can just create clones of them. As for Minic, he will easily be blitzed or blasted before he could do anything, despite his many powers.
Mimic has copied both goku's and janemba's powers, abilities and skills but he can only go SS2 hes not going to be blitzed.
@taichokage: Yes Mimic nearly died but "went into a coma but thought dead later to be revived from him copying wolverine's healing factor when he was near him" from the gamma poisoning during that time with Hulk and Onslaught Mimic's powers were slowly recovering after he lost them to Super Adaptoid he had no control over them they were actually drawing the life force of those around him and he sought help from individuals. I can't quite recall around the time met Onslaught I think he made an deal/alliance with him upgrading his powers for his services. As for the speed I think it depends on how many individuals he copies determines the speed. I think his limit for copying people is 5.
Wich version of mimic is this?
Exile one has 5 powers limit, absorbed power is halved and he can't stan gamma radiation nor mimi non mutants
616 version has original x-mens power, can absorb powers of others, can control them at greater degree and they are not halved