After mostly abandoning the Goldfish, I've found that the Junker is pretty much one of the best choices. It's not fast, but it's very agile and the broadside style of play allows your to circle the enemy and get in their blindspots while firing at full power, equiped with some good disabling guns and good gunners you can work wonders.
My favorite loadout has come to be the Double Artemis and Hades side as well as a Carronade/Banshee side to accompany it.
Second most prominent ship is probably the Squid with a similar style of play (blinspots and circling) and disabling guns like carronades, artemises and banshees, even mines. You can even brawl with the new Gatling and be very effective, I'd try a Gat/Banshee combo.
As to why these two ships, I think it's fairly obvious, they are the most resistant to Gatling/Mortar style of plays, now with the reduced range of the Gatling, the enemy will have to get close to start causing harm, which in turn makes them play in your advantage field due to your better mobility in close combat.
EDIT: Also, Triple Artemis and Hwacha Spire, because you can never have enough rockets.