Leopards can be kept as a harem in aquaria.My favorite by far is the blue star leopard wrasse. I wouldn't do more than 2 of those though.
A social acclimation box does wonders for mitigating any aggression when adding new wrasses.Question for the people with 3, 4+, did you add all of them at the same time? any issues adding 1 to an established tank?
I personally haven't really tried any other than the 6 line which I love
However, sixlines have a particular dislike for other wrasses.