I don't know if any of these would count as being significantly sized, but Japan, Australia, and South Korea handled it a lot better than the US [1] when it comes to deaths per 100k. Interestingly, Australia and South Korea did have more cases per 100k than the US[2].
The Australian cases would largely have been after the vaccine was available, I think (though Australia did screw up the rollout; they could’ve done better there) so you’d expect a lower death rate.
An interesting thing to look at is the differences between European countries differing responses and how that worked out for them given many are connected via land borders.
[1] https://91-divoc.com/pages/covid-visualization/?chart=countr...
[2] https://91-divoc.com/pages/covid-visualization/?chart=countr...