Thor

Thor is the norse god of thunder and a founding member of the Avengers.

Formation of the Avengers
Seeking revenge against his half-brother Thor, Loki used the Hulk  to lure him out into the open. Not only did Loki catch the attention of Thor, he also brought forth Iron Man, the Wasp, and Ant-Man, leading them to band together to retaliate against him. This inadvertently led to the formation of the Avengers.

Alter Ego
The alter-ego of Thor is Doctor Donald Blake