If you depend upon armor for its own mobility within relatively short ranges compared to their transports, but long ranges compared to troops on foot, the Hulls C is a likely candidate. You're then not planning to fly a transport into battle, and no one should want to do this. Even armored troop transports aren't really expected to go to battle--their cargo is too precious to risk for the sake of a few minutes surprise. MV-22's don't have guns to this day, despite folks have talked about putting a chain gun on the chin--the Pentagon resists because they don't want anyone tempted to fly them into a battle where they would just make a nice target. Instead, modern armor creates surprise by traveling relatively large distances in short periods of time--see General Schwartzkoff's brilliant surprise strategy during the first Gulf War. Operation Desert Storm really was a storm of surprise.
What the Hull C has though, is enough lift capability to set a Nova down (perhaps several), enough engine to get away unladen pretty quickly, and three turrets for defense in case the LZ is not as clear as one hoped. They're actually pretty cool ships. I know people are more attracted to containerless carriers like the BMM, but container carriers like the Hull series are actually modeled after the world's premier transport system--the intermodal carrier (has many other names) which is the steel box we put first on a semi at the factory, then use a gantry to put it on rail, then another gantry to put it on a container vessel. Believe it or not, that is a very evolved system of shipping, 6,000 year in the making. It works great and is the biggest reason why products can be shipped in bulk from around the world and not cost too much to afford when they arrive at their destination.
All of the Hull series are designed around the most advanced transport system in the world. Don't discount them just because the boxes are external. The boxes are external on semi trucks, rail and sea transports as well, and such transports are also a great way to ship a tank.
I have this arcane interest because we are designing such a system for use in space that should likewise afford optimum value for vast amounts of bulk freight.
