The dragoon, owl and the frigate with the 2 universal slots are goddamn amazing and works of arts. I have 3 owls and 4 dragoons in my fleet because their just so goddamn effective and versatile, i have sniper/brawler/energy dragoons and owls they actually survive! The destroyer that looks like a butt is also amazing but its to fast for its own good and i've lost a few when they get overwhelmed.
The dragoon is pretty much the definition of a fleet cruiser, it can survive on its own long enough for you to rely on it and it can run from anything it cant kill. Its PD coverage is beautiful and its turret positions and universal mounts mean it can literally fill any role that you need it to. The standard fittings for them are insane and no matter how much i see them i still get surprised by their fittings ensuring that each and every one is seen as a threat.
The owl is beautiful for its rear and front universal mounts--it can survive and fill any role you need and its fast to boot! I had a missionary of lud ship but that got destroyed real fast but i havent lost an owl or dragoon yet and i've gone up against insane tri-tachyon fleets.
The only frigate that actually survives in my fleet is the shepard which is hilarious, it has 1 88 flak, 1 assault cannon(both okims weapons) and another weapon that i forget but this thing has survived for months! The flak cannon is essential because it keeps the swarms of missiles/fighters off it and with extended magazines it has enough ammo to ensure it will last the entire battle.