Ive had good experiences with Alex @ BMW Seattle. Someone else mentioned a guy in fleece best, everytime I've seen him that's what he's worn.
I've had an issue with BMW Seattle but it wasn't a SA. I tried to get my key read data from Seattle and the young male receptionist told me that BMW USA Corporate bans them from giving out key read data. A quick call to BMW USA proved that that excuse was a complete fabrication and it is up to individual dealers whether they want to give that out or not. I would've been fine if they were just honest and said their policy is not to do that, but they had to pass responsibility to BMW USA. Annoying, but BMW NW gave me the key read data no problem.