With Durant going down, Lebron aging and Curry starting to show some age (still excellent, all of them) is Kawhi the best player in the NBA. I would have to say yes. I don't know who is better. Antetokounmpo or Kawhi? Easily Kawhi for me as the #1 skill in the NBA today is the ability to make shots and Kawhi is so much better of a shooter than Giannis.
Does he stay in Toronto?
Can you leave after having so much success? For most I would say no, for Kawhi I would say yes. I actually think he moves to the LA Clippers for next year, but would love to see him stay in Toronto and the East.