Now, I myself am not quite sure if I have the definition of anti-hero right (someone who does something bad to achieve a good reward, right?) but I have a character who fits under this really well.
He's my main character (I bet you're just cringing) and he plays the role quite well. His 'crime' is against the female Protagonist (they are not a couple) of whom my male pushes away in order for her to stay happy. I know that doesn't sound so bad, but the woman is dependent on the poor guy, and the guy himself was in love with her once. A long, long time ago.
You moght know him. You might not. He is M.
But this is basically a character chat where anti-hero people come around and yeah