I think people are comparing Brown to the wrong players.
LeBron, Pippen, Wade are all elite passers, which is a skill set you don’t just ‘learn’.
For me the players Brown should be compared to are Paul George, Jimmy Butler, Gerald Wallace, Jason Richardson. I think Richardson especially is a forgotten star because he was playing in an era with Kobe Bryant, Ray Allen & Tracy McGrady at the shooting guard position.
But I guess if you were looking for an absolute best case scenario for Jaylen, perhaps Dominique Wilkins is a close comp for his natural skill set.