Portugal. 4% SWR (tolerating dips to 3.5% occasionally). Once you're old enough to collect Social Security (if US centric), you can tolerate a bit more drawdown or market vol (or lower your annual WR) with the additional monthly benefit. D7 visa requires only ~9k EUR/year in passive income for the lead applicant, a bit more for each additional adult or child on the application. Universal healthcare system buffers you against medical tail risk wiping out your assets. Non Habitual Resident tax status is favorable to this level of wealth.

(not investing advice, see https://www.reddit.com/r/ExpatFIRE/ for more info or other leanFIRE locations)