Have you considered the Nexus 6P?
Someone downvoted me, I guess the phone landscape really is a fantastic one and I was wrong.
But yeah, it's something worth thinking about. The major appeal of a phone like the Pixel is less the hardware than the vanilla aspect of the Android OS.
All another hardware vendor has to do is attempt to stay up to date, and minimize their own bloatware if that's a bottleneck in their time allocation allotment. I'm surprised no one sees that a lot of Android users clamor for a vanilla, up-to-date Android OS phone.