Do not know the operations in Washington State but hear good things about Rendevous in Barkely Sound on west coast of Vancouver Island, and have greatly enjoyed my outings with Pacific Pro Dive in Campbell River.
If you enjoy your first trip and want to head somewhere a little more remote and wild I highly recommend Port Hardy area at the north end of Vancouver Island. It may take you an extra day of travel from the Seattle area but trust me, it is worth it.
Google Gods Pocket and you will see what I mean. The owners of the resort are retiring and they will not be accepting new bookings until the new owners get set up. Was there a couple weeks ago and while the underwater life was amazing, seeing multiple whales, dolpins, sea lions etc from the boat kept the short boat rides interesting. As did the rafts of sea otters, and the lone wolf we saw swimming between islands.
Enjoy your hunt for Wolfies and GPO