Just FYI 
If you have a US capital one 360 acct with the new Discovery debit card you can only use Bangkok bank as far as I can tell 
Downside the max is ฿25k per withdrawal 
Upside it’s only a ฿150 baht ATM charge is ฿250 for every other Debit card minus the Thai BB acct holders (maybe the US BB bank debit card holders) 
I know haters will call me cheap and to spend as much as humanly possible per ATM transaction but hey ฿100 is ฿100
Have a great day
TLDR : Answer Summary
Using a US Capital One 360 account with the new Discovery debit card allows withdrawals only from Bangkok Bank ATMs, limited to ฿25,000 per transaction and incurring a fee of ฿150. In contrast, other debit cards may face higher fees (฿250). Other options like Schwab, Fidelity, and Lending Club cards can be used at any ATM in Thailand without incurring fees, as they offer refunds for ATM charges.