I don't know if this will be helpful to you or not... I have no idea what location might offer you the best salary after taxes, but I do know that the kind of cost-of-living (COL) data you find on websites and various COL calculators may not really be all that useful.
As an example, realize that Jacob lives in California, a notoriously high COL state in the US. Yet, it seems to me that a lot of what elevates the COL in California is the cost of housing, taxes, dining, and gasoline. So, if you can find a way to reduce the impact of those concerns (live in an RV, have little taxable income, don't eat out, and don't drive), your individual COL may not be so bad, in absolute terms. Perhaps Jacob pays 10% more for his beans than I do, but in absolute terms, this may be only a few dollars a month.
The point is, don't rely solely on a COL factor given by a website, because it may not be accurate for you. Try to figure out what your individual COL will be. What would you actually pay for a small place near your work and grocer, etc...? I have a cousin in Zurich, and his major COL variable seems to be food, specifically eating out and meat. His rent is subsidized by his job, and he gets a rail pass from his employer too, so even though the COL factor for Zurich is much higher than his home (Columbus, Ohio), his actual monthly COL isn't.