A lot of dramas with the title "Legend of _____" are usually either wuxia or historical dramas, so it's your best bet to search through that!
Some of my favorites wuxias:
The Legend of Qin (HE),
Prince of Lanling (SE),
Chinese Paladin (SE), and
Swordsman (HE/SE depending on who you ship).
*HE = happy ending, SE = sad ending
Just a side note, a lot of the more recent wuxias (maybe the past year or two) have similar plots: the male lead begins to experience weird symptoms and discovers he has special powers (or he's given powers) and is someone everyone's looking for, etc.
For example,
The Legend of Qin,
Legend of Zu,
Legend of Chusen and many others have this kind of storyline.
Of course you should definitely check out the classics rainruma suggested because they're all very well known stories that are constantly being remade.
I believe most wuxias have sad endings, so just be aware of that.
Legend of Qin is a happy ending for both the main and the second lead, which made me happy because I shipped the second leads much more and usually only the main leads get a happy ending if there is one (everyone else usually all dies). Just beware that the main lead's stupidity level is very high that it gets annoying at some point(s).