Alpha

Alpha is an Eternal who turned against the council when he decided they should no longer be allowed to interfere with the people of reality's lives. He is the one who led the Avengers (which included the Fantastic Four, X-men and many others) to war against the Eternals. After he killed all the Eternals he was the only one remaining and decided to Isolate himself to prevent the Eternals from causing anymore damage.

Prior to his banishment he was the Eternal Council member of the 4th Universe named Alpha, he fought in many of the Universes greatest conflicts as Alpha such as the Infinity War and Infinity Crusade, he even killed the former council member turned Titan Warlord Thanos during the latter conflict.

As a human, Alpha began to develop more human like feelings such as romantic feelings for Peter Parker, something he could choose not to feel while in Eternal Form. As Alpha he fought many of the Earth's largest conflicts as well such as The Battle of Sokovia, The Avengers Civil War and Apocalypse's takeover of Earth. While in his human form he also fought in World War Hulk and was part of the Avengers team who faked their deaths in order to infiltrate the Warmongers Base disguised as their people. It was during the WWH's battle of New York that Cameron revealed Tony Stark gave him his mark 50 Iron Man suit before he died and he then began to serve as Iron Man until his power was restored in Alpha vs The Eternals when he destroyed the Eternal council deciding they should no longer dictate what happened in each Universe.