I know of a story of Dutch manager/director with a civil partnership who was granted a dependents visa for his Dutch civil partner, but the fact that this may have been granted might have to do that the company in question was a large international one, and his position was upper management/director.
So if you were to secure such job post I'm sure a large international company could work things out.
As in investor? Yes, with a minimum direct investment of 20 million baht in any of the 13 targeted industries you may avail of the BoI Smart Investor Visa program,