There are still prototypical PRR locomotives that have yet to be made.
Steam Locos such as the
D16 4-4-0
F3 2-6-0
J28 2+6-2
K2/K3 4-6-2
N2sa 2-10-2 (former usra 2-10-2)
2-8-8-0
I would hope that the powers that be make these Wanted PRR prototypical units first before any fantasy design units.