30 gal is too small for anthias, and triggers. Get a Toby (dwarf puffer) and a wrasse, like the six line, or mystery=$$$$$$$, and get a pygmy angel-as long as you have enough live rock for acclimation purposes. You can do most clowns-except maroon. You can do longnose hawkfish, Flame Hawkfish Most gobies/ dartfish/ blennies. Avoid psuedochromids/dottybacks- more violent then damsels ( I have seen a bicolor dottyback @ 3" live for months with 3 10" groupers, and a 14" lobster for about 8 months, and he kicks their ***es regularly) There are a few morays you could keep You can also do the longnose file fish, saddled filefish. I can name hundreds more, but do some research, you will be amzed at what you will find that you want. Eventually a bigger tank is what you get though.
There are a couple of anthias that can be kept in a 30, but really should be kept in larger quarters.