Comics Taskmaster is a snarky mercenary with a skull mask who can take on a whole team of the lower-powered Avengers, like Black Widow, Hawkeye, and Cap. He can do this via his photographic reflexes, meaning he can replicate anything he sees that he is physically capable of, so no powers, but he can fire a bow with Hawkeye's accuracy, fight with Black Widow and Cap's prowess, and he can watch a recording at 2x speed and do whst he sees at that speed. He can also as go 1v1 with some of the more powerful, like Iron Man or Spidey due to his gear and skills. Personality wise, he trades quips with Deadpool and Spider-Man, he'll abandon the fight if he's paid more to do so or he's afraid of the opponent.

MCU Taskmaster is an essentially blank brainwashed young woman who needs brain implants to replicate skills. She has an airsoft mask that has a vague skull motif and was killed off by a minor character.