I'd go for a big tank of small fish - like 20 - 30 Chromis viridis, a few centropyge (a harem or two different species), a good mix of small gobies, a few hawkfish, a few cardinals to make a small school, and maybe a wrasse or five. Oh and 7 - 15 pearly jawfish
In any case, I'd opt for small fish - large fish (8"+) look out of place in any tank smaller than several hundred ~ thousands of gallons, IMO.