Looking at those powers who could be potential claimants for the crown, I would say America is the best of a bad bunch. By far. Generally speaking, American values are good values - democracy, freedom of speech, liberal capitalism, equality of the sexes, relatively free of corruption, racial equality. Sure America does not always live up to those values perfectly, but it is way better than China, or Russia, or any of the Middle Eastern powers, or Indonesia etc.
It is much better that the Allies won World War 2 not Germany and Japan. And it is better that America won the cold war rather than the Soviet Union. We have to be realistic about our options.