I hope these haven't been suggested yet... I read the thread, but I don't feel like double checking...
Urd, from AH! My Goddess/Megami-sama. She has some pretty cool outfits.
Kurama in Youkou form (fox demon) from Yu Yu Hakusho has white/silver hair...
Calintz from Magna Carta: Crimson Stigmata has white hair, twisted and clipped up (it's longer than his MC: Phantom of Avalanche hair- see my avatar for a headshot) www.magnacarta.jp
Felicia and Joker also have white hair (Magna Carta)
Jiraia from Naruto
Myoubi from Alichino (some people wear white)
Rosiel from Angel Sanctuary (I think)
Abel Nightroad from Trinity Blood
Lobelia Carlini from Sakura Taisen/Wars 3
Sakura from Hyper Police (kyuubi fox)
Aisha Clan-clan from Outlaw Star
Nataku from X (but it's short)
Sesshoumaru from Inuyasha
Lady Chris from Suikoden 3 (video game)
Possibly Ruri Hoshino from Nadeshiko (might really be light blue, I'm not sure)
That's all I can think of for now....