I think Jones is the best ever already. His skills (amazing wrestling/clinch/submissions/GNP/creative striking/cardio) combined with his physical advantages (height, massive reach, extremely point elbows for cuts, strength, chin) and his dirty tactics (fingers in opponents face/eyes) pretty much makes him almost impossible to beat.
Unlike GSP (chin and couldn't finish anyone), Anderson (wrestling), Fedor (wreckless style) ... Jones doesn't have a legit weaknesses for anyone to take advantage of.
Like Machida did well against Jones for one round but one mistake he got taken down and one elbow later he is cut and dazed.
Or you fight him like Rashad and Rampage from the outside but you can't do anything since you can't reach him from there.
Or you go in like Cormier, Sonnen, Glover and get beat up in the clinch and/or taken down.
And even if you can stand with him from a distance like Gus .... eventually his threat of takedown and creative striking will catch you like that fake duck takedown into the spinning elbow that won Jon the 4th round vs Gus and the normal takedown that won Jon the 5th round against Gus.
He pretty much is dominant and or a huge threat in all areas a fight can take place and there isn't a solid gameplan that you know can work against him.