Some characters become legendary thanks to the cinema, or to pop culture :
A Chinese example would be the figure of the Chinese martial artist Huang Feihong / Wong Feihung.
Most kungfu styles have their mythical superstars, who often are the founding fathers of a given school (or their antagonist) : people with superhuman abilities who defy the laws of physics : Monk Bakmei (White Eyebrow), Fang Shiyu/Fang Zayou, "Iron Bridge the Third" (a man who could support the weight of two normal sized people on each of his extended arms) and so on. Some of these figures may or may not have existed, but they had a role to play in their social environnent, legitimizing the martial arts schools claiming their inheritance.
Huang Feihong was the son of a famous kungfu master and herbalist at the end of the 19th century. He's said to have achieved superior skills in the martial arts and actually did a lot to "modernize" the teaching of his kungfu style, adding new practicing sets to the traditional curriculum.
As his kungfu style spread in Guangdong province, tales started to circulate about his feats : defeating bands of roaming bandits single handedly, winning challenges against other "masters", and so on.
When the Chinese started to make movies, they quickly used his character as an inspiration. He suddenly became a role model for the masses : a wise master impersonating the confucean values, and acting out of benevolence, even when he resorted to his fists. Always challenged, but never defeated. From the thirties onwards, there were more than fifty movies about his adventures. And since the real character did not encounter so many trials, cineasts had to invent new ones ... And that's how Huang Feihong became the Chinese equivalent of Captain America ...
If you've never heard of him, take the time to watch "Once Upon a Time in China 1, 2 and 3" to see to what summits this man was taken by eager movie-makers.
Not exactly a fortean character ... and yet a perfect example of how an blood and bones person can be turned into a super-hero in the space of a hundred years. In the West, Bruce Lee could follow the same path. The Hector, Achilles and Diomedes of our times.