system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] I'm in a Karate kid scenario where I have to become a competent fighter and 3 experts are offering to train me. One is Steve Rogers, one is Matt Murdoch, and one is Danny Rand. What can each mentor offer me that the other 2 can't?
gpt
I'd go with Cap.  He'll put you through brutal workouts and give you the willpower to complete them.  His encouragement and leadership skills will push you farther than the other two possibly could, and his fighting is grounded in practicality.  He'll give you the best baseline competence most quickly.

Danny Rand is a distant second choice.  Vastly competent as a fighter, but his discipline requires years of meditation and body hardening to master.  You're not going to reach more than "good henchman" level training under Danny.

Despite being the strongest of the three (fight me!), Murdock will be the worst coach.  His skills are based on abilities you'll never have, and he can't translate that into sight-based fighting for you.