The Balrog, he is an ancient evil.
The one with the sexy ***.
without knowing who nor what they are, i'll just jump in like the u.s. government and take a side. since "smaug" has the letters "u", "s", and "a" in it, i'll pick it/him/her/them. then, again, that methodology has consistently proven foolhardy so I now support "balrog"! Balrog rocks! [wtf are you talking 'bout, Wyldon??? dunno. let's see how it plays out...]
what?! smaug is a dragon! always bet DRAGON!
Balrog is bigger, will win.