With my newest custom race, the Kaaran, I've been pursuing a very Homeworld-esque aesthetic. I think it's come out well so far.
The Kaan-Sora class is currently the pinnacle of Kaaran navy design. It features four independantly moving turrets, and cutting-edge Kaaran armor (Despite the pitiful technology on it, it actually is quite a threat currently in my galaxy, with how slow research is.)
Another smaller vessel, produced in large numbers, is the Kaar-Lun class Corvette. It can be configured for a wide variety of roles, be it exploration, anomaly investigation, or even war. They're most often, in the current Kaaran-Makudan war going on (Another custom race of mine), used as logistical fill-ins for Kaan-Sora based fleets.