By some he is I think.
LeBron certainly is one of the most amazing guys to have ever played the game, purely from an athletic standpoint.
The guy though in big games (during the rivalry years with the Celtics/first stint with the Cavs) and seems to always been involved in some pissing contest with teammates.
I'll freely admit I really stopped following basketball after Seattle lost the Sonics even though I grew up a Jordan, Pippen, and Rodman fan but I can't imagine many sports a guy jumping ship to chase titles with super teams being in the GOAT discussions.