Rocky Bay Equine used to be my vet, Bo Weeks and Mark Ness were partners. Mark has since opened his own. Good, good vets although I do not have experience with them doing PPEs. They are in the Gig Harbor area.
Sarah is wonderful, thorough and very direct, honest good gal who knows her stuff. She is in the Olympia/Yelm/Roy area.
Kent is a leg man, he is the go to guy for soundness issues. He did many, many PPEs when I worked for a pretty well known breeder out here, I admire him and trust him implicitly. He is in the Kent (LOL!!)/Renton area between Tacoma and Seattle.
I don’t know the other. When I buy I will most likely use Dr. Dugan, I have moved from Gig Harbor to Tacoma and he is nearer than Rocky Bay–
Out of your list Kent is by far the most experienced and proficient at PPEs.