Thanks guys. I know this may sound bad, but he really isn't all that unbalanced. It just paints a terrible picture when he's flying around a dressage ring, his head in the air like he's howling to the moon...And when I say "Not all that unbalanced", I mean that he does have SOME issues that are a linked to his head being giraffe-like.
I'm hoping, if I build back his upper neck muscles it'll come easier and his fugly awkward neck will go away to be replaced by a nicely toned, new, actually horse-looking neck....Lol. We're just working towards the finish, and I'll take all of this advice to heart and see what works.
EDIT - That sounded so vain, like I'm only doing it for looks...Which I assure you I'm not