Few too many asterisks for my liking to say GOAT, maybe I'm just too incredulous for my own good, but his latter years surge leaves me with too many questions.
Taken altogether: looking back at the "Decision Dan" era, the Anderson loss, the Nog Bros submissions, some razor thin wins and his current day gameplans(basically, go yard), I see too many negatives, and that's going before his Clemens-esque twilight dominance. I DO certainly think he's an "all-time great" with one of the most impressive resumes in MMA history, win or lose to Bones.... IMO, the column against his GOAT rating is too steep to ignore.
BTW, Rickson Gracie is the one and only GOAT