well sorry to inform you but you do not want to do puffers or triggers. triggers will eat your corals and are fairly aggressive. the same with puffers. and if you are looking at tangs your pushing it with a 75 gallon tangs need a pretty big tank. you would probably get away with a yellow tang. and angels I would stick with the dwarf angels like a flame angel or a coral beauty or lemon peel and even those sometimes will nip at corals. and dragonets I would not put one of those into a tank no less than one year, the reason is you want to make sure you have enough pods for themm to eat that is what they live off of. I would not go with damsels either, you get them into the tank and they become terrors they are very territorial. Sorry about all of the bad news. This is just me talking and what I have observed in the past in my own tanks. now on the other hand you still have some very nice fish left to choose from. you can do like a school of blue chromis. they are neat when they are in a school. 6 line wrasse they are neat fish and have some very nice color. clown fish are allways a winner. some butterfiy fish are nice. blennys are allways full of personality. I love my lawnmower blenny. gobys are great. I almost bought a diamond goby the other day he was so beautifull. royal gramma those are really pretty fish. that is just a few I can think of right now. I hope I didnt bum you out with all of the bad news.