Florian Neuhaus: I was excited for him but this season he doesn't seem to have developed more, I don't think he'll reach world class level or the level to be a star for Germany. Falls in the same category as Eggestein at Bremen.
Wirtz: Definitely like the look of him in the few matches he has played, but again not enough matches to fully judge his ability
Baier: Similar to Wirtz, not enough appearances to judge how talented he really is.
Tournarigha: Haven't seen him play a lot but did hear he's been consistent in the XI for 2020, keeping out Stark, who I like. He can be named if I'm also naming Tapsoba. Another one from Berlin is Meier, but he's been poor since his return from injury and isn't starting anymore for Berlin.
Suat Serdar: Nope, not talented for me. Never liked him at Mainz and never thought he'd do well for Schalke as well. Though Schalke is not the best place for a youngster to be playing right now, I don't think he's better than average.
Katterbach: I'll be honest, don't know of him.
In any case, none of these players are equal to talent of the German players I mentioned in my post, and also aren't as talented as the others.
We do have a good pool of talent at the age bracket above those others, such as 23 and above, where you have guys like Sane, Brandt, Gnabry, Sule, Goretzka, Kimmich (the batch that won the Confed Cup and U21 Euro championship in 2017). That's as talented a pool of players of that age you will get in many other countries, but sadly I think that's the last talented pool Germany will see in a while.