As of right now, of all those names, only three are top 20 prospects in the system in my rankings – Gorman, Mendoza and Montero – all third basemen.
Gorman is still years away. Worst case, Montero could become the next Yepez and not be able to handle the FSL. Mendoza is interesting, but is unfinished defensively and lacks the power one would prefer from 3B.
As you noted, there are some interesting offensive players at all levels, and I believe the bigger problem ahead is going to be pitching.
(Minor point, but Nogowski should not be listed with GCL, and at age 25, is a borderline prospect at best.)