Lebron needs the ball to maximize his and his teammates' game and I think that eliminates teams such as the Rockets (Harden, Paul), Celts (Kyrie, Hayward), Sixers (Simmons) that already have players that need the ball to be successful. The Warriors don't need help and the Clippers won't compete for several years. Likely landing spots could be Lakers, who would be competitive with another superstar to complement LeBron and a good young core of players with some potential.
My dark horse team is the Spurs, where Leborn would join the best coach ever Popovich, This would make a lot of sense if Kawhi Leonard stays and another superstar joins the party.