This Feelicks Ojhay Alleeseemay kid seems pretty good.
Seriously, I've been meaning to start one and maybe provide a "players to watch" list or keep an updated ranking of NextGenners, but haven't gotten around to it. But here are a few guys that people haven't really been talking about that deserve mention:
Mikael Ymer is 20 years old until September and still ranked a measly #200, but he showed early promise and is considered the more talented of the Ymer brothers, and missed a lot of time. So maybe he'll be a late-ish bloomer and at least reach the top 50 or higher.
Miomir Kecmanovic probably deserves more attention than he's been getting, having a small breakout. He's now #89 and the third highest ranked teenager after Shapo (#20, turns 20 in four days) and FAA (#33, 18 until August 8th). Miomir turns 20 on August 31st.
Rudolf Molleker is someone I'm keeping my eye on. He's #170, born 10/26/00, so a couple months younger than FAA and the second highest ranked player born in 2000.
Jannik Sinner is a name that I don't think has been mentioned. At #316 he's the highest ranked player born in 2001, just a few months older than Jack Draper, the next great British hope (evidently).
Chun Hsin Tseng is #427 and noteworthy because he was born the same day as FAA and the Great One, but in 2001.