For ones that fly from Bangkok to JFK or Newark these all pretty much have newish to top of the line business class seats -
ANA, Japan Airlines, EVA, Singapore, Etihad, Cathay Pacific. For a couple of these there might be older business class on your connecting flight within Asia but the long flights should be good. Another option is connecting on an Asian carrier then Delta, AA, or United for the longer flight. All the US airlines have newish seats.
These should have new or acceptable the majority of the time but not guaranteed
Qatar, Emirates, KLM, Air France, Asiana, Finnair, Lufthansa.
Here's an example of Emirates being sued for a bait and switch based on their advertising
https://businesstravelerusa.com/news/two-passengers-sued-emirates-for-deceptive-advertising-in-new-zealand/
Definitely confirm for these
Korean Air
Turkish
British Airways
I'm not aware of an easy way to tell about a particular route since some have schedule changes throughout the year. You could post here, or in a Reddit thread for the particular airline, just provide the dates and flight numbers. Or Google something like (Turkish business class seats review) and limit the search to the last couple of years to get an idea of what is on offer. Calling the airline is probably the worst option since they may be clueless or give you incorrect information.