For me it's Shang-Chi, the Master of Kung-Fu.
Anyone who read this series (it ran for 125 issues, 1974-1983), knows what a great story this was. Shang-Chi is the son of Fu Manchu & was trained to be a living weapon. This series had a great cast of supporting characters too.
Honorable mention: Iron Fist. Another character that was great! The 15 issues of his solo book & the Power Man team-up were great books.
As for villains...nothing comes to mind.
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