If you can, ask a local agent or director that you're interested in working with if they prefer natural backgrounds, white, or grey. There are so many options and some people in our industry have strong preferences--so know before you spend the money! Many of these photographers will be willing to work with you on what you'd like.
I've been behind, but I've added some of the amazing talent in our community to this list. Thank you for your recommendations! The one's marked NEW are not new in talent, just new to me.
In no specific order:
David Hiller Kimono Photography Lisa Squared Vertizon Photography Wayne Rutledge
Linda Dalton Mike Nakamura Gabriel Solis Eva Blanchard New!
Greg James LA based, Seattle Studio
Mark Brennan Vancouver based
Michael Ford Vancouver based
Kevin Clark Vancouver based, will travel
Lauren Hurt LA based, Portland Studio
Lavenda Memory Portland based
Prices are steadily rising in the area as more and more actors begin to take their headshot seriously. There are many more talented photographers that I didn't mention here. If you know of any I should add, let me know!