I opened on tourist stamp in BKK bank in Patong/Jungceylon. Had help from Thai speaker. So I thought easy to do in branch next to my home few years later but they gave some BS until they understood I own a condo. Showed my chanote and then I was welcomed...
You could try UOB but no idea how they are other then good in Singapore and more international.
There was a post about this before. Try searching for it. The parts I saw was that you have to go in person. However I would not be surprised if some agent / lawfirm could help.