I could add some.
GoldfishLumberfishStar: Gunner
Honorable Mention: Pilot
Good gunner on a Lumberjack is golden, but the pilot will need to keep the ship steady.
FlakfishStar:Gunner (Especially with Lochnagar)
Honorable Mention: Ally ship with piercing damage.
I've seen Flakfish gunners wreck havoc, sniping out hull shredded enemy ships at 1500m. But that's only if the ally can shred enemy hull.
PyramidionRam-Oriented PyramidionStar: Main Deck Engineer
Honorable Mention: The Other Main Deck Engineer
Dunce: The Captain (for choosing such build at the moment)
Back when Melon was around, Gilder was happy with the Squid, and the Pyramidion was tad bit strong, Ramidion reigned supreme. It can still work, but somebody will smash in the captain's skull with a mallet.
Minemidion (Pyra w/ Mine)Star: Top Deck Engineer/Gunner (whoever is mining)
Honorable Mention: Pilot (w/ perfect trifecta piloting)
On every mine-build, the guy on the mine has to be amazing. But if the captain can get the trifecta with the Minemidion, mixing in fires or bullets or explosives with the mine, it is godly.
Then, I want to edit something
Spire
Brawler (Gats + Hwacha or Heavy Flak)
Star: Gunner Pilot
Honorable Mention: Main Engineer
Put H-Flak/Hwacha with Gat on the sides, then put a mortar on the top front gun (close to helm). An active pilot will fly the ship, hammer with mortar, and maintain the hull at the same time. In my opinion, the gunner on a Brawler Spire doesn't have to do anything extra-ordinary to make the build work.