I’m going to mention the ‘Chromis’ word but not the ones you think, ignore the ‘green’ Chromis.
Black bar Chromis (C.retrofasciatas)
Half and half Chromis (C.iomelas)
Blue head Chromis (C.limbaughi) if you can find them
Caribbean blue Chromis (C.cyanea)
To name a few there more if you fancy researching them. Like most fish they don’t ‘shoal’ in our small tanks but they will live as a group and interact (I found the black bar behaviours particularly interesting). They can be mixed and matched, easy to keep and feed. Perfect jitter fish.