Kdramas: That Winter the Wind Blows, + for Gentleman's Dignity, Innocent Man (alt name, No such thing as nice guys), Though more of a romcom, but...
Life Mission - KN, that's the best I can recall. Maybe Acquiring talent in a dungeon (but translation has been suspended). +1 to Arena recommendation.
Inuyasha, X, xxxHolic, Gungrave (at least first half of it was good), Samurai Champloo, Wolf Rain, Macross series, Rurouni Kenshin (Samurai X),...
Separate names with a comma.