As you don't work remotely from Thailand the workation option is our. They may not want to give you one based on soft power due to your extended periods away for work but you can try. The Non-O based on marriage is the best visa for you
They make no mention of 6 months payslips in the visa portal. If you plan to work remotely from inside Thailand then workation is your only option. Soft Power DTVs don't provide permission to work remotely.
I'm guessing what they want to see is a residence certificate. Go to your local immigration office and get on, then go to a mobile provider and get a SIM registered against your passport (with receipt) then go to a bank and try again