He's riding on reputation alone at this point. If you said this a few years ago no argument from me. But not now. He is playing his worst basketball this year in his entire career. He's too busy speaking up the Big Apple spotlight.
Its actually alot easier to guard shooters 1 on 1 then it is to guard players who ar e physically quicker or overpowering. Lebron or Westbrook.
It has to come from one of the strongest centers, they can just back down defender, and score every time. The small guys have to make every of their outside shots, or the game will be over.
Someone big and strong enough to post and back down opponent on offense, and quick and strong enough to guard anyone on defense. Only one guy: LeBron
Lebron is definitely a great answer, but at this point I think its Anthony Davis. No one from this list including Lebron or Kawhi is big enough, strong enough or tall enough to stop Anthony Davis in the post. On defense, AD has enough quickness and speed to avoid getting easily blown by for easy lay up and still be able to contest jumpers. And while he might not be able to stop Durant or Curry from shooting 3 point shots, he could at least some what bother them defensively inside and outside, while none would be able to bother his post ups.
lebron vs jordan 1 v 1 would be the better question. No one has LeBron's combination of offensive and defensive versatility. Anyone who is decent at bball understands this principle.