Although a bit unfair, I argue that Lebron is already the best basketball player ever. If you take today’s Lebron and put him in any era in history, he would dominate. That includes the Jordan era. Of course athletes get bigger, stronger and faster from one generation to the next, so not really fair but worth pointing out. I’m not sure that Tiger would, since golf is such a mental game.
That said, if both careers were to end today, Tiger lived up to the hype more mostly because Lebron’s best teammate in Cleveland was Mo Williams. And he took that team to the Finals. Even Jordan wouldn’t have been able to do that. He couldn’t even make it for a few years with Pippen on his team.