90 gallon stocking

Hi I have a 90 gallon that has been set up for probably 6 or 7 months currently we have a yellow tang on the smaller side 2 clownfish a magnificent foxface a flame angel and a cleaner shrimp, we have snails and hermits also and do corals softies lps and one piece of sps I want to add mabye 1 more fish or mabye 3 smaller fish is that too many fish? And any suggestions for fish thanks