That's a DC-3/C-47, the earlier DC-2 didn't have that big a ventral fin as part of the tail, and one of the two Trainers looks like a T-6, well, to be honest, they both do
Thanks. The list is a little bit complete now.
Regarding the T-6, it could also be an I.Ae. D.L. 22 which was the Argentine copy of the T-6.