He's not, and that's not an insult.
Top 5? Absolutely.
Top 3? Probably.
1? No.
Jordan is still better in every measurable category, from simple stats to advanced analytics, career or best seasons (and is still on top when you include the two sub par Wizards seasons)... and wins, and championships. And that doesn't even measure that they're playing two different games, that Jordan did what he did in a game that allowed the defense to play a considerably more physical style, and that the defensive three second rule eliminated the dominant post player on both sides of the floor, clearing things up for greater guard penetration.
LeBron is an all time talent, a starter on the all time team. He might just be #2.
He's not #1.