I was also from an East Coast med school and I'm not at any of the places you're considering so I think I'm pretty impartial. I didn't apply to UCSF or CHO (Oakland) but interviewed at the rest. I really liked Hopkins but it sounds like you're more interested in the West Coast so I'll focus on those.
Of the West Coast programs you mentioned, I'd probably say:
1. Seattle. Great program. I've had several friends go here and love it. WWAMI sounds like an awesome experience no matter what type of peds you want to do. Seattle is a great place to live. Awesome research opportunities.
2. Colorado: huge catchment area. Big hospital. Seems pretty friendly. Denver is awesome. Good exposure to all sorts of peds, both sub specialty and primary care. Awesome research.
Then, 3 and 4 are probably a toss-up between OHSU and UCSF. I personally prefer PDX to SF and the cost of living in portland is MUCH more reasonable. I know you say you're not worried about cost of living, but the rents in sf are higher than anywhere else in the country and a large fraction of your income as a resident will go to rent at UCSF. OHSU is obviously a smaller program with a little less of the super subspecialty peds and research than UCSF. UCSF also just opened their new children's hospital. From what I've been told, UCSF has a much more "east coast" vibe (more formal) than most other west coast programs, and it's up to you what you prefer. At UCSF you're also covering more hospitals.
I hear CHO has really great clinical training but less research than the other places. The cost of living here is more reasonable. I have heard that it has fewer resources than the other west coast places you're thinking of. There's some relationship between CHO and UCSF that I don't really understand but I don't think the two residencies formally interact much.
That would be my recommendation for the West Coast programs. Think about where Hopkins would fit in depending on how strong your west coast preference is. Bear in mind that I never interviewed at (or even applied to) UCSF or CHO.
Good luck with your decision! Any of the programs you're thinking about would be awesome places to train, so it's very reasonable for personal preference for where to live to have a large impact on your rank list.