It can be done, as I am currently doing this same thing (1 male naso, 1 chevron, 1 scopas). Each are different sizes, but be careful with the purple. My purple excepted a scopas tang, but ended up being sold after he and my blue jaw trigger wanted the same rock to control. Both are together now in a 225 and are co-kings of the tank . They were sold to a local here that needed help with a aggressive powder blue and they lost their issues with each other. I can say with the ones you have listed, try to get smaller sizes. This will help if you have a budget like me and can only aquire 1 at a time. Each time, rearrange rocks if needed and add the newbie at night. I believe it should go as follows: kole tang, purple tang, and last the white cheek/gold rim. Good luck