You forgot the Captains class AG
lol
@ Pheonix
You can add the Empire freighter no problem
There will be a ship update for GWX sometime in the future with most of the extra ships AG has noted above
Plus a few more
Hopefully AG will have couple more of his great new merchants by then too
If you want to add any new ship try to use JSGME then if any problems you can remove
Larger warships are the most awkward due to eqp loadouts
EDIT
Yes AG the BR light cruisers have some generic entries
No other countries do however as most dont have any