Recommended tags:
ferengi, ferengi male/female, dark skin, dark-skinned_male/female, bald, big ears, nose markings, brow ridge
Optionally: teeth, sharp teeth, fang, tattoo, dark eyes, bags under eyes, and of course Quark as he made up a good 80% of reference. jacket and colorful jacket do a good job at creating the typical Quark-looking attire.
This is my first ever Lora! It was trained using screenshots from Deep Space 9, Lower Decks, and Star Trek Online, so sometimes it can be a little finnicky with it's style. Seems to run best at around 0.7. I have tested it with several style loras and it seems to work fine on most.
The main problems I have noticed stem from the ears and the 3D tag. If you put 3d into the negative you will get a much more painterly style, but it struggles to figure out the ears without it. I did most of my testing on AutismMix.