From someone whos done it....I dont really agree with the color/shape theory so much.
These guys have been together 5 years....they get along fine as you can see, no shreaded fins...
Of couse theres no promises any fish mix will work and tank size and other tankmates and health of fish and system matter...I added the purple ( That was bigger than the yellows ) last, into a school of 5 yellows, into a 180g reef, a little introduction squabbles but not bad and not for long.