#1. NAME: Natasha Romanoff / Black Widow (Scarlett Johansson)
MCU APPEARANCES: Iron Man 2 (2010); The Avengers (2012); Captain America: The Winter Soldier (2014); Avengers: Age of Ultron (2015); Captain America: Civil War (2016)
C’mon, who else would be tops on the list? She’s bilingual, knows like 4,000 styles of martial arts, has beaten up aliens, and stays in shape.