Well I wouldn't pick an actor(sorry for that) :P I'd pick no other than REN from নিউএস্ট অথবা even GACKT! I might be crazy but I always imagined Sesshy with one of their faces(can't decide! >w<)!...um...maybe if Ren were older? :D Anyway I just told আপনি my opinion!(especially the lips of Ren!!!) X"3
I don't think there is an actor who could play such a beautiful, proud demon. Sesshomaru would be insulted we were trying to get a HUMAN to play him. "Ridiculous" If anything, I think they could use the kind of computer graphics they used on the movie "Beowulf" With those kind of effects, they could bring that magnificent character to life.