No doubt, that title should be awarded to Yeung Gor.
Here's why:
On this forum, YG is the most talked about. I notice even those who dislike YG can't resist talking about him. His story is captivating. He overcame so much to become one of the greatest martial artist of his time, even creating his unique Sad Palm which rival that of the 18 Dragon palm, not to mention he's the only one who knew the full Dugu Quibai's martial arts. He has unique features such as the white/gray streak of hair, his one arm, and that giant condor that travels with him. He has a big heart to forgive those who did him wrong and the courage to risk his life to help those in need. All those things makes him cool. And he ends up with the hot goddess XLN. He has it all.
Therefore, YG is simply the best character ever created by JY. Hands down!
PS: Post-ROCH YG can beat ANYONE! (HAHA)
Who's yours and why?