* Sentry platforms (turret-mines, etc).
* Weapons platforms (larger than mines, packing a few turrets).
* Cruiser to Corvette sized ships.
* Freighters and cargo containers to go along with those.
* Modern Vasudan fighters adhering to the Volition design evolution rather than being freaks-of-nature.
If you want some original, but not too often used ships:
* Passenger liner (I'm sure most civies don't go from A to B in an Argo, neither do I think 100% of the space transport operations are ran by the military branch of the GTVA).
* Tugs, construction ships or other logistical vessels which aren't freighters.
* Damaged versions of excisting ships for mission usage.
* Under-construction versions of excisting ships for mission usage.
* Interiors for cutscenes etc.