I think we should also list the 20 and younger players, not 21 and younger, for Jaylen doesn't even turn 21 until the very beginning of next season.
And doing that, well, there aren't even that many players in history that were 20 years or younger and played as many minutes as Jaylen did. If we filter by > 1000 minutes (Jaylen was at 1341), you only get 87 players in the history of the game.
If you pick the cutoff of 0.0, you get players like Gordon Hayward, Andrew Wiggins, Shareef Abdur Rahim, Harrison Barnes, Jabari Parker, Rudy Gay.
And, if we just increase it a tad to 0.1 VORP, you get Kobe Bryant and Giannis Antekokounmpo