Happily, here's one from Delta as I described above https://i.imgur.com/wwYQXy1.png. Sadly (for me, at least), I've never flown above "First" on such a configuration from Delta though :). Like you had noted, they call it 4 cabin classes... but the economy classes ("Main" & "Comfort") are both treated as a single cabin in terms of service and the difference in economy seats is an inch or two of leg room. So it's really a 3 cabin of: business, first, economy.

Again, hbosch said ATL<->SFO... and you aren't going to be flying Air France or Japan Airlines for that route. My list, as far as I'm aware, was exhaustive for that route. It was not a cherry picked search of airlines which do it that way or global claim of what all other airlines do, only a response to the particular claim. On other routes/airlines the statement could, or rather "would", certainly have been true. Honestly, I think those airlines have it the right way around, but, having flown the exact route and the same airlines internationally, it did not match my experience for the route - which agreed with the labeling for all airlines for that route according to the links above. Unless, perhaps I'm missing that American or similar does actually have a ATL<->SFO to be compared with?