Steven Rogers (Earth-2326)

"This planet, these people... they're special. We never give up, no matter the circumstances. I've fought in a war before, Skrull. I know a losing side when I see one."

- Captain America

Steve Rogers was the first successful Super-Soldier who became Captain America during World War 2. In order to defeat Hydra, Captain America had to land a bomber plane in the ocean, where he remained frozen for decades. He was eventually recovered by S.H.I.E.L.D., but after being thawed out, he was abducted by corrupt agents within S.H.I.E.L.D., possibly working for HYDRA, who tortured him for some time before selling him to the highest bidder; Doctor Doom. However, the transfer was interrupted by the Avengers, who rescued Captain America just in time for him to aid them in stopping the Kree-Skrull War from destroying the planet.

Trivia

 * The lie that Steve's birthday is July 4th was fabricated during the initial "Captain America Press Tour" during World War 2, before the formation of the Howling Commandos.