These type of heroes are my favorites in romantic fiction. But I love them best when they never give up on the heroine: Hate the ones who start out all obsessive, but winds up losing steam or giving up towards the end. All of my favorites can never stop pursuing the object of their desires and can't live without their heroines (for better or worse). Here are some below:
"Game Rai Game Ruk" -Sooo in love with the H and h. Loved how the H was so passionately in love with the h to the point where even his "revenge" seemed more like "courtship." He was truly bleeding his love and even when he's "jerky," he's still exuding his passion/love thru aggression. For me, I only really like slap/kiss and revenge lakorns (Thai dramas) because of their intensity/excitement level. And I found that heroes like Charles (H in here), who's both devilishly alpha and loving towards the heroine, are rare. Usually they're more jerky and I have a harder time seeing the "love" from their reprehensible actions. Yet I found this drama to be the exception: I've seen immense love from pretty much every one of Charles' hurtful actions. It's like every time he tries to hurt her, he ends up hurting himself far more and that level of emotion just really gets to me.
"Harper's Island" -One character in here takes obsessive love to the max when it comes to the heroine. Spoilers below...
The villain from horror/slasher TV show, "Harper's Island" is an 100% yandere. He's sadistic and duplicitous, basically manipulating all the events and killing everyone that'll stand in the way of him and the heroine. Everything he does is so that he can be with the heroine in the end, just the two of them "forevermore." Loved this series and loved him...I'm a total sucker for yandere villains (real villains, esp. the ultimate baddie, not mere mean bullies, etc.).
"Ten Miles Peach Blossom" (Eternal Love) -The H can give up anything/sacrifice anything for the h and chases after her like a bloodhound -he basically deceived her into marrying him by not disclosing anything about himself (his biggest fault is his tendency to keep everything to himself and shoulder all burdens). He tries to shield her from everything, but when all hell broke lose, he tries to protect her using the wrong method and it cost him. What's even more attractive is how arrogant and cold he was before he met the h -nothing and nobody can affect him. He's never loved anyone (there's a lady who stayed by his side since they were little and is obsessively in love with him, but he's extremely cold to her) and finds that emotion to be a nuisance. His 3rd uncle even said that though he's seen as "perfect" (crown prince status, extremely powerful and handsome) in everyone else's eyes, he's incomplete in his eyes because he lacks emotion/affection. Well, that all changes when he meets our h: She's the only one who can melt him and make him go crazy. Seriously, this H won't be able to live without his beloved h. When he thought he lost her, he gave up on life and almost died. He also cries a lot because of her -I just want to hug him (love his manly tears). He also sees through all female machinations and is never fooled by "other women" tactics. The drama's so good at making us see everything from the perspective of both leads, unlike the book which just focuses on her side. I totally feel the H's desperate love and pain...swoon!!! Here's the Ost for the opening theme (love H, Ye Hua and h, Bai Qian): https://www.youtube.com/watch?v=0BdFqakPJR4