I am in the midst of using Rainier Overseas Movers, as a) they're local to Seattle and b) they are recommended as a non-scam on movingscam.com. Everything has gone well so far, except they're way over the estimate of 35-45 days. (The boat is set to come into port on the 9th, which will make it around 60 days.)
I was impressed when I was only charged for the 125 cubic feet I ended up shipping, instead of the 200 cf I was quoted for.