My capital ship is actually a fleet carrier with multiple loadouts.
(All of these only use the Krooms Forge mod.)

This one is just the base fleet carrier, nothing inside...yet.

This one is a dedicated supercarrier, meant to house swarms of fighters and light vessels.

This one is meant to deploy an entire defensive fleet at a system, carrying 9 Defense satellites, 1 Light Outpost, 4 Fighters and 2 Attackers.

This one is meant to deploy a blockade fleet, consisting of 3 Heavy Frigates, 1 Light Outpost and 6 Patrol Ships.

This one carries a light offensive fleet, consisting of 2 Multipurpose Cruisers, 2 Heavy Destroyers, 2 Light Destroyers, 3 Patrol Cruisers and a Flak Barge.

This variant carries a heavy offensive fleet of 2 Heavy Cruisers, 2 Light Cruisers and 3 Patrol Cruisers.

This version of the fleet carrier simply carries a battleship into the fray. Even without undocking, the two are a fearsome bundle.
Maybe posting a new faction with these as the capital ships? Idk.