A-3, two A-5's (1.37 and 1.42 version, since IIRC, the change was universal and somewhere within shouting distance of midway through the production run), A-6, update the A-8 make it represent a standard late model instead of a bomber hunter, add the A-9.
At least if we want to do full coverage.
We could get by with an A-3, a 1.42 ata 190A-5, and two A-8's (split into early and late production models).