Arnim Zola

Arnim Zola is a recurring antagonist in the Marvel Cinematic Universe, appearing as the secondary antagonist of the 2011 superhero film Captain America: The First Avenger, the overarching antagonist of its 2014 sequel Captain America: The Winter Soldier, a posthumous antagonist in the 2016 film Captain America: Civil War and a mentioned character in the 2019 film Avengers: Endgame.
He is a Swiss Nazi scientist who aids Red Skull to organize HYDRA in his quest to conquer the world with the Tesseract. After Red Skull's defeat, Zola is pardoned and recruited by S.H.I.E.L.D., but instead joins forces with Alexander Pierce and rebuilds HYDRA after its dissolution, allowing the organization to survive into the 21st century and pose a threat to the Avengers through its many undercover operatives.
He was portrayed by Toby Jones.