From what I see:
Yesha Empire: Goldfish and the Galleon, if you look at their designs, they are very much East Asian style influenced which Yesha is.
Fjord Baronies: Mobula, has that royal feel to it with the glass and the unique fencing and trim. I would also say the Pyramideon for the baronies because it looks very much like a mass producible ship, something you would see in a fleet.
Chaladon and Mercantile Guild: Spire, mainly by it's look to be put together in all the right places and also a bit of flare to it, someone spent ACTUAL money to build this and not rigged it up.
Arashi League and the Anglean Empire: I would have to say the squid, mainly because these are two cultures that do rely on a bit of raiding to survive. A quick, maneuverable ship can take down any size ship and makes for hit and run tactics. The Junker, as well, because it looks like something rigged up with pieces of other ships, something the Arashi League and the Anglean raiders are known for.