You left her off the list but (ignoring power level and just talking about hand-to-hand combat ability) I say Mantis. She isn't just the peak of human physique like Captain America, she has perfect control over her body, which is more important.
From a profile of Mantis (note the part about her being able to stun a being as powerful as Thor):
"Powers: Thanks to her training by the Priests of Pama, Mantis had "complete control" over her body. Her agility was as great as any woman without superpowers could achieve. She was also capable of willing herself to recuperate quickly after being injured. Mantis had extraordinary ability in the martial arts that have been developed and perfected over thousands of years by the Priests of Pama. These fighting methods place particular emphasis on the manipulation of pressure points and nerve endings on the bodies of one's opponents. Thus, by knowing the right areas of the body to strike, Mantis could stun even a being as powerful a Thor even though she herself had no superhuman strength. Mantis had an empathetic ability which enabled her to sense the emotions of others, which she felt as psychic vibrations. After her transformation into the Celestial Madonna she had the ability to communicate with all plant life. She could also transform herself into pure energy and "beam" herself to another planet and then recreate her body from the indigenous plant life. This ability was limited to only planets with plant life. Its range is unknown but believed to be limited."