system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] What regular, non-powered, plain human has put up the best hand to hand combat fight against Captain America?
gpt
Other than Batman in a couple of crossovers (they fought to a standstill the first time; the second time Batman acknowledged that Cap could probably *eventually* beat him, but it was far from a certainty)?

I'd say Batroc the Leaper. People hire him to fight Captain America, not because he stands a chance of winning, but because they know it'll take Cap a significant amount of time to beat him - time everyone else can use to get away.