Everybody in the top of the draft. That's why these guys are high draft picks because they get results on the court and you're not getting top results without having an understanding of the game,(high IQ).
High IQ is thrown out there for guys with limited NBA abilities/athleticism as compared to other NBA players.
Height, lenght/wingspan, quickness, jumping ability, shooting form and consistency, ball handling dribbling skills. The top players will check off enough of these physical ability boxes and also have high IQ.
Coaches and gaining experience increase the understanding of the game. But it's not rocket science. It's not that difficult. Boxing out, tapping rebounds to a teammate, reading where the ball will come off on a shots trajectory and getting into position for a rebound off a missed shot, seeing the floor to make a good pass.
Basketball IQ involves reading the game, anticipating plays, and making the right choices under pressure. It's about knowing when to pass, shoot, or dribble.
Players with high basketball IQ often seem to be in the right place at the right time.