You can throw Hakeem in the mix there.
Arguably the most versatile big man in history - he could score, pass, rebound, defend, shoot. Only man in history (I believe) to record two quadrouple doubles, and he has two championships to his name.
He likely would have more titles then that if he didn't play in the era of Michael Jordan.
But I do have to admit, as much as I do not like Lebron as a person, he's an incredible talent. There are not many guys (if any) that I can think of who can switch to pretty much any team, and that team immediately ends up in the finals. That's pretty much what's happened with Lebron's past 7 seasons.
And when you look at the guys he has around him, his best two teamamtes are Kyrie and Love - and while those guys are very talented players, they aren't winners. Lets be honest - how many games did the Cavs and Woves win when Kyrie and Love were their best players? How many times did those two guys carry their teams to the playoffs? AFAIK the answer is zero.
Thomas instantly turned this Celtics team from a lottery team with the 6rd worst record to a team that made the playoffs three years straight, and the Hawks did not once miss the playoffs since Horford started playing there, so both Horford and Thomas are proven leaders and winners.
Kyrie and Love are proven to be the complete opposite of that, and as talented as that Cavs team is, they are nothing without Lebron.