Try "Cruel Romance" - The villain is seriously creepy; he's like a fallen angel. He's hot, but that's his only saving grace since he kills anyone and everyone regardless of age, gender, or status. What makes him so dynamic is that he mistakes the main heroine for his dead lover and tries to make the heroine be his former lover that you almost pity him because you know he just wants to be reunited with his deceased loved one, but then you remember that in just about every scene, he's either torturing or killing someone. The fact that the villain can interact socially while still being able to to twiddle/twinkle/dance his fingers (Imagine jazz fingers) at someone right before he wraps them around their neck is chilling. The actor plays him so well and I think you'd enjoy watching him act out his part.
