TS is just being a cunt for the sake of it, but I'll respond, anyway.
He might be the best in the clinch of anyone in MMA. In terms of physical abilities, he is the fastest fighter in his division (Horiguchi and Dodson were comparable) and he clearly has the best stamina (he's incredible relative to his division; it's not because he's a FlyW). He's as good as anyone in the sport at cutting off the cage, and he is much more versatile than the majority of strikers in the sport in the sense that he is very good on the front and back foot. I'd suggest that he isn't necessarily a great striker from distance on the feet, but he's still clearly very good relative to most, and he's getting more comfortable in the pocket as of late while correcting some mistakes he used to make (backing up in straight lines with his chin up, etc.). He's an elite MMA wrestler (as good as anyone in the sport at transitioning between striking and grappling) and he has an ever improving top game (to the point where he just smashed and submitted a very legitimate blackbelt on the ground).
He has pretty close to the most complete skillset in the sport, and when you factor in his athletic gifts, fight IQ and heart (he's never shown an ounce of quit in his career), you see why he's likely the best fighter in the sport.