Planning an addition to your house? Those are some huge planes.
Also, as a dio, they won't make much sense. No story. Even if you were replicating the Air Force Museum at Dayton, the B-36 is in a different building from the XB-70.
Cold war bombers include B-36, XB-39, B-47, XB-49, B-50, B-52, B-57, B-58, B-66, XB-70, FB-111, B-1, A-1, A-4, A-6, A-7, A-10 and F/A-18, and their variants . The F-4, F-5, F-100, F-105 and F-15E and some F-14's and F-16's were also configured to deliver rather heavy bomb loads but were never formally recognized as "Bombers." All of these have been or are available as kits in 1/72
The aircraft in your second post are not strictly bombers, but fighters equiped to deliver bombs as a secondary mission or helicopters modified/designed to provide close support.
Check the prefix. B/FB=some sort of bomber and A=attack or some sort of ground support aircraft capable of delivering significant ordnance. The exceptions to this are the A-12 and F-117. The former being another code for the develpmental aircraft that led to the SR-71 and the latter being a light bomber.
If you're serious about "Cold War", you'll want ot consider the B-29, A-26, F-(formelyP-)51, F-4U4, and F-9F which served in these roles in Korea