Palestine

TL;DR American healthcare has middlemen extracting profit as a rule, and are the only developed country where that is the case.

But if we're judging the quality vs. cost of the healthcare itself, excluding people who won't be given healthcare because it's an apartheid state is fairly reasonable, because we're comparing the 'civilized' healthcare systems and their efficiency.

If you want to compare disparity in healthcare you're going to need a much more complicated matrix; comparing between class, ethnicity, and religion within a country, and then also between countries, would probably give you a better answer...and it would still end in America ridiculously overpaying for shitty healthcare.