To date, US fighter pilots are the best because they train under all conditions and have FREEDOM.
I shouldn’t but what the hell.
Freedom has nothing to do with it.
All men want to and expect to live when engaged in war.
As far as equipment. The US has yet to test its fighter pilots against equal or greater threats
To say they are best is as of yet really unproven.
It would be better to say that they have the best equipment designed according to the war fighting doctrine the US follows.
China and other countries have a different doctrine that they follow. Their equipment is designed in accordance with this in mind.
With this mind there are trade offs which hopefully never get tested by either side.
As China expands and modernizes it's forces so too will their doctrine change.