It really depends on the branch/branch manager policy, unfortunately. Some are more foreigner friendly than others. Your profile says you live in Chiang Mai, try Bangkok Bank in Kad Suan Kaew or Nimman Rd. Get a residence certificate and bring it along with your marriage certificate, your passport and your lease/tenancy agreement for the account opening. Best to go with your wife, should make it easier.
It's my understanding that ANY contract between spouses is void if they entered into it while already married. That's the reason prenups have to be done before getting married and cannot be changed/amended afterwards.
What you read might have referred to the SMART S visa. It does indeed allow operating a Thai Limited Company without the need of a work permit - and therefore bypasses the need for Thai staff.. You will still need a Thai majority owner though, unless you manage to get a BOI promotion for your company.