This is a good idea.
And try to partner with Hasbro if you can, and still, talk to HISS Tank forums. I can get you in touch with folks there, too.
But genuinely, maybe getting a set with army builders built in.
Flint, Lady Jaye, Zartan, Cobra Trooper (with a torso and a head for a female conversion).
Shipwreck, Spirit, Firefy and a Cobra Viper
Tomax, Xamot, a Crimson Guard and Stalker.
Dusty, Gung-Ho, Dr. Mindbender and a BAT.