The World's First Superhero: The Ogon Bat. A man sent forth from Atlantis to battle the forces of evil with his superhuman strength and mental power.
https://en.wikipedia.org/wiki/The_Golden_Bat
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I am going with another time traveler, The Doctor. He is grossly overskilled compared to the people he deals with, can time travel and has changed events to suit him, and is nearly unkillable with marrying his primary assassin on his bingo card.
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I am going to pick Hawks from My Hero Academia. He is a winged hero that loses his wings later in the run fighting to save the city from Dabi.
https://hero.fandom.com/wiki/Hawks#:~:text=Keigo Takami%2C also known as,youngest hero to do so.
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Read The Secret by Child and Child. In 1992, Captain Jack Reacher becomes embroiled in a manhunt over a 1969 chemical weapons leak in India and relatives looking for revenge.
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I saw that. The wiki does point out he must have some memories of something because he is able to become Ultraman in later versions of the show helping other Ultramen save the day.
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I am picking the DEO from DC. I don't know what their status is now but at one point they were outside the Task Force X umbrella. That might have changed in the last few years.
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