I have kept nearly all of the Tang you have at different time. In my recollection, L. Kendal is most conspecific aggressive, and its hard to keep two together for long. L sexfas is conspecific aggressive, but its cousin tretocephalus are exceptionally peaceful. Comps are tolerant but leulupi and it’s cousin cylindricus are extremely aggressive. Most Tang are more conspecific aggressive than across species, so it’s best to keep one or many to spread out aggression.
Currently I have a dozen L. tretocephalus in my 75g getting along peacefully and even breed in it without killing one another. I have a L. Elongates in my 125g, closed cousin of kendali, that lives to grand 8+ old age after killing off couple of his juvenile siblings early on.
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