Your b&w ocellaris might take to the anemone at some point. It can take a while. Percs may or may not, E. quadricolor is not a natural host of either ocellaris or percula, but often hosts in aquariums. With an ocellaris already in the tank, your options are limited as to another species of clownfish. Another ocellaris or perhaps a percula would work. Natural symbionts with RBTA's are tomato, maroon, clarkii, none of which would be a good idea with your ocellaris. Skunks are peaceful often times, but also not natural symbionts with RBTA's, so also not a sure bet to take to the anemone.