[st1ck]

There are some comparisons, like https://thebanks.eu/compare-countries-by-tax-rates

But a lot of details are missing in them. Countries like Romania, Ukraine and Georgia have single-digit % tax for sole proprietors, but IIUC it applies on revenue, not income.

Estonia has 0% corporate tax, but 20% on dividends, which should go well with technique discussed in the OP.

Or for the higher income brackets, Italy has €100k/year flat tax: https://www.economist.com/europe/2020/10/29/a-flat-tax-schem...