here are anti hero ML-s, without cliche "wanna be bad boys", only really good dramas, because even character is good, if drama is bad, you will not enjoy
sorted by greatness of drama:
Cruel City - a real anti hero, he is practicaly gangster + great mature romance where sex isn't tabo, amazing acting, characters, story and unpredictable plot,
Flower of Evil amazing drama, and best acting as I've ever seen in asian dramas, not only from ML, but FL is on highest level
Memories of the Alhambra greatest show, unpredictable, unforgetable, Cold ML very charismatic, must see drama
The Rise of Phoenixes great drama! ML is kind of ruthless, very smart, he has kind of dark side and he is that kind of lead who goes to target like chess player
A Love To Kill sad story, there will be tears. ML is ruthless to FL, because she is target of his revenge
Lucifer there are 2 ML-s, one is detective and second is mastermind criminal, his revenge is real mastermind, both guys love 1 girl, and girl loves bad one "devil" even knowing who he is
The Smile Has Left Your Eyes kind of dark ML and super charismatic
Kill It detective FL who chases contract killer ML
The Innocent Man he really is anti hero, and interesting love triangle between 2 girl and 1 guy
A Man's Story SML is anti hero and not good person, but he is more star of the show than ML (practicaly they are both MLs) this story isn't usual "good guy" wins over "bad guy", or bad guy has redemption, everyone in this show except FL are against SML but he never looses
Hello Monster ML has questionable moral decisions, but other him there are 2 greatest antihero (villain) characters, but drama doesn't treats them in traditional black/white way, it's very complex and unusual plot/characters relationship and maybe most emotional bromance. it's really must see drama
Lady & Liar
The King's Woman
p.s. flower of evil, smile has left, memories and rise of phoenixes - MLs in these dramas, are less anti heroes then others, but all of them has dark charisma and really great character development, they feel like more anti heroes and dark MLs, then "city hunter" (who is more bed written hero), Great seducer or K2 (which is great drama/character, but he is just serious, kind of rude badass guy with tragic past)