Good bank in Bangkok for a fiance on a visa exemption?

Hello, Some facts (you can tell I am a veteran):
1) I will be in Bangkok next month.
2) I will enter on a 30 day visa exemption.
3) I understand it is difficult to open a bank account in most banks in Bangkok on a visa exemption.
4) I am engaged. My fiance and I are getting married in May.
5) I need to deposit 40,000 THB into a Thai bank account for 2 months prior to my application for my Thailand marriage visa. So, I will need to have a Thai bank to deposit the required money into during April and May. We have loads of pictures together and shes got a 120K baht ring on her finger (No, I didnt buy the less expensive and more traditional gold, dont judge me please  I just like the ring. She does too. What banks do you recommend in Bangkok that will be able to assist with my situation? (Engaged, on a 30 day visa exemption) Any recommendations/tips? Sorry if this has been beaten like a dead horse. Thank you!