Are you thinking in having a moray eel? If so a Snowflake eel would be a good starter fish seeing your tanks nitrite is zero and your very low nitrate level if any. You get a few dozen snails and try and stick with a more community tank rather then jump around to so many different ideas were you find it to be extremely difficult to select from, and to top it off, your only a 75 gal tank.
So your the clowns you want, now select a wrasse and of the angels you might select from, it be best to go with the flame angelfish, but get it later after your tank age some. Also pick only one smaller growing surgeonfish and some others like a Basslet and Basslets are territorial so add towards the end with the flame angel if you decide to have it.
For the fish you will have, please do your research before buying them and be sure to offer each fish the best variety nutritional diet you can and two of the best Basslets I know of to choose from are the Royal Gramma (Gramma loreto) and Blackcap Basslet (Gramma melacara).
Without the trigger fish, you can have snails, just you need to check on them if they turned over, you will need to place them upright so they can feed, if you fail to check on them and the some did turnover somehow, they will die.
Buddy