To the OP, I have stayed in all of these and you can probably get a room for about 1200 a night:
This one has a nice rooftop bar - right next to 72 Race & Bar and about 10 other places, Warehouse 8 etc. Good Thai nightlife.
https://suvarnabhumisuite.com/
Both of the below are within a few minute walk to Robinsons and Paseo Mall in Lat Krabang.
Not as good as it used to be but ok:
https://www.thecottagebangkokairport.com/
Older, but big rooms.
https://www.arantaairporthotel.com/