He's certainly up there. His defending is suspect at times, and not just against Lebron. Paul George still deserves a mention, even though he's in a bit of a slump lately. He's sort of the inverse of Durant in that he's a step below in offense, but a significantly better defender. I haven't compared useage rates, but I'd guess PG is below Durant, and like Lebron, PG has several players he can fall back on. It's all still definitely up for grabs.