Since it no longer has to be the main character, I recommend
Flame of Recca.
Kurei has lots of the same qualities as Sesshomaru. He's handsome, cold, distant, super powerful, self interested, protective of (some of) his own people, etc.
Spoiler (highlight to view)
He's even the half brother of the protagonist.
The only thing that might not fit in is that he's pretty much one of the bad guys throughout much of the series.
Spoiler (highlight to view)
He's the main bad guy throughout first part of the series (covered by the anime) but later he splits off to become sort of a rogue faction. Definitely not one of the good guys, but also enemies with the bad guys.