The group of five big twin a/c look like Varsities, and I think at least another four are Varsities. The other twins of similar appearance are Viking or more likely Valletta’s, the tail wheel undercarriage making different shadows than the Varsities.
In front of the hangar appears to be two Rapide/Dominie’s with slim wings and short noses.
Possibly a couple of Piston Provosts there but not sure.