10. Black Widow

In her most recent iterations, Black Widow has been enhanced via technology and super-serums, which really should make her ineligible for this list. However, she’s been around since 1964, and certainly deserves a mention.

Originally a spy and Iron Man’s enemy, Black Widow defected to join S.H.I.E.L.D. An excellent tactician, she led the team on several occasions, which says a lot about her skills at martial arts, marksmanship, and even ballet.

But she’s much better known for her ability to psychologically manipulate others for many purposes, including the extraction of information. We guess this comes in handy for her as a spy"¦

Speaking of S.H.I.E.L.D"¦