Thats close to what happened with me. I bought 2 percula clowns from the lfs. One died a week later, so he was alone for abt 2 months. I got him a big boy and they have been like 2 peas in a pot.
So it could be hit and miss the one I have is the boss of the tank so I think I might try to get a smaller one or try to switch her out for a pair is snowflake clowns
I am just looking for more on the lines of what other people have together or what has worked for them vs what a corporation in sales has to say. But I do use that site as a reference
Sunbust (fathead) Anthias is nice and a single one would do great in a 75 gallon. The colors are amazing. It's shy at first but once it feels comfortable it will hang out near its cave all day.
Only thing I don't like about mine is it only eats frozen food. I like to feed my fish pellet food which helps to keep my nitrates very low. Otherwise a very nice fish.