That's awesome research.
I'd be curious to see the numbers for West Coast teams playing at 10AM PST/1PM EST, as I think that's a whole different animal than playing in the late afternoon or on Prime time.
I suspect you're correct, but that was more than I had in me.
I on the other hand had it in me. I started from 2010, when the NFL switched the paired teams in each West division so east coast teams wouldnt be forced to make four west coast trips in one year (like what happened to the Jets and Patriots in 2008 when they played in San Diego, Oakland, San Francisco, and Seattle in the same season). I also started the Rams from 2017 when they moved back to LA. I included the London games since all of those games that feature a West team start at 10:00amPST/PDT. Here are the 10:00am standings.
1) Los Angeles Rams: 10-3 (.769)
2) Seattle Seahawks: 22-14 (.611)
3) Los Angeles Chargers: 18-19 (.487)
4) San Francisco 49ers: 20-23 (.465)
5) Las Vegas Raiders: 19-33 (.365)