Gladiator

Gladiator is the leader of the Imperial Guard. Despite being a noble hero, he is bound by loyalty to whoever rules the Shi'ar empire, be it good or evil.

Biography
Gladiator came to Earth after the fugitive Lilandra. He showed his strenght level by punching Juggernaut away, but then he was defeated by Phoenix.

When Emperor D'Ken got the power of the M'Kraan crystal and showed the extent of his madness by trying to reshape the universe, Gladiator sided with the X-Men against him.

When Jean Grey became possessed by the Phoenix Force, Gladiator led the Imperial Guard in fighting the X-Men over her fate. Gladiator fought Rogue and they destroyed the structure they were fighting in, and then Gladiator rised, victorious.

Background
This is currently the only version of the character outside the comics.

In the comics
He faced Colossus instead of Rogue, who didn't exist as a character yet by the time of the Dark Phoenix saga.