Airservices Australia easily the "best" ANSP...
So altruistic they are ensuring the staff shortages around the world are solved by exporting Australia's controllers for free!.
So altruistic that the Australian public are exposed to approximately 100 TIBAs and Restricted Traffic NOTAMS a month....makes other third world airspace seem downright safe.
AsA does the initial training, invests years getting each controller well experienced then "encourages" them to work ridiculous hours and refuses to pay market rates thus ensuring "Gday Bruce" is heard the world over.
Don't believe me...Check this out!
YouTube - Crisis!
But hey, what you say about NATS these days could mean they are second best??