As someone, who has been working remotely from Thailand since 2016 until end of 2019, when I got a bit tired of the whole visa mess and moved to a neighboring country, I would really need just one thing: a long-term, multi-entry visa that allows you to work remotely from the Kingdom.
The 10y visa proposed a few months back would be just fine, provided it's finally implemented. I don't mind the requirements, most people in my line of work (sr sw engineers), won't have any problems meeting them.
It's really simple - just implement the visa, publicize it a little bit, and people will start flowing in. Not sure if I would come back for good, but would get the visa just in case.