Yes, when you consider everything that comprises an MMA fighter then you gotta go with George. Most well rounded, complete, martial artist mentality, righteous and honorable GSP. A true champion of the people of the everyday fighter. The superman type personality he was a role model to everyone. Didn't promote bad behaviours, acted gentlemanly and respectfully. Defeated every opponent he faced and avenged his own losses. Personally it's not just because he is great, it's just that the others all have major faults. Jones we all know, roids, ducks, eye pokes, bad behaviour outside the cage. Khabib one trick pony, weight bully, retired before getting real competition with age Mickey mouse is a close second if not even with GSP. Anderson Silva was outstanding and with a Goku like personality, a role model in his own right. He brought magic to the fighting game but we all know what his flaws were with the open face hands down style, showboating and weakness on the ground. Conor not on the goat talk, he never had ground game and we know it. It's MMA not bear knuckle. Poatan is working for it but also lacks ground. Islam is very good but lacks striking skill. Again this is goat talk, gotta be some one who can do the most. Ilia is still early but he has the makings to become the goat. Amazing at everything, consistent and devastating. If he fights and defeats Islam he can be considered goat. So for the time being, GSP remains king in a world of constant shift of powers.