Who is the king of martial arts?

Who is the "best" martial artist is a matter of opinion. What qualifies someone as being good as a Martial Artist could include several areas of expertise, or a combination of many - - so it depends entirely on what qualities the observer values. Ability to fight well, or demonstrate techniques is one important aspect, but so is a complete and comprehensive knowledge of the art. One might be a champion at tournament fighting, but not very good in street self defense. Many experts agree that a true Martial Artist is one who has a high level of self control, including living by integrity of character with morals and ethics.

While many people are going to have their personal favorites, the majority of the most knowledgeable, skilled and honorable masters are the ones most people probably have never heard of or met. Being completely humble, and modest, a true Martial Master would reject the label of being called the "best." Such titles are not only arbitrary, they are fleeting, and can change at any instant.