Genus, size, landscaping (hiding places) and other factors. i currently have Earspot, king, koran and french + yellow tang n american whitespotted filefish in my 5ft. Angels introduced in stated sequence n all fishes between 6-8 inches.
What i found useful is that yellow tang n the filefish are able to hold its own and help to distract king angel's aggression. But the listed angels also tend to be the hardier ones.
I did not quarantine but used partition for new fishes to acclimate.