And in a case of convergent evolution
With regards to the movie Broadsword, the inspiration (or rather, I suppose, the limiting reagent) would be the English Electric Canberra cockpit they built the ship around (and of course the same for the Rapiers, built from Lightning fighters.) The StarLancer bomber would have been designed by the same artists who worked on the movie, so that’s the connection there!
I’d say the likeliest inspiration for the original Dralthi is not the 1989 Batwing (though certainly, right time!) but instead the original circular Battlestar Galactica Cylon Raider. The Dralthi wouldn’t really get the more familiar bat wings until the version seen in Armada (and Wing Commander III.) (Another bit of parallel evolution there is the alien fighters in the 1994 Stargate movie, which showed up at the same time as Armada/WC3.)
I would say there’s some Millennium Falcon in the Galaxy, especially the look of the cockpit. If you look at early Privateer storyboards, they actually use sketches of the Falcon as a placeholder in the landing bays, ship stores, etc.!
It would be nice to have an 1980s anime expert look at some of the Wing Commander I ships; I know the developers have said specifically that many of them were anime-influenced… I suspect we’d find some connections as close as the Rapier/Firefox and Raptor/Gunstar!
And I have always thought the overall layout of the Tiger's Claw very, very strongly resembles Robotech's SDF-1, particularly the line art version in the manual art.