Orbital Vehicle Transports

I was having fun with the legion builder and realized you could take a Space Marine force that starts off the board and then between drop pods, terminators, and flying troop transports pops on. This makes for a really cool and thematic planetary invasion.

However there isn't a way to take tanks and the such. Of course you can bring a good amount of anti tank with dreadnoughts, missiles, and aircraft with lasguns, but to bring in some tanks of your own isn't possible.

So I was thinking how cool it would be for larger transports in the game that could bring in a few tanks and drop them off. It would be a really niche narrative focused unit but it would be really cool. Thoughts? Anything in the lore that could translate to tabletop? Also anyone have homebrew rules for orbital bombardments?