Most severus are very peaceful, but as always the individual fish could turn out to be a cranky jerk. I haven't tried breeding anything really, but in a community tank it may prove difficult to keep everyone away from the eggs much less the fry unless you have a plan to move them as soon as you find them. I'm sure others can give you more direct experience, as stated I've never tried to breed anything intentionally, but the only fish I've had breed in a community tank with any survivors were some swordtails, and only 2 fry survived into adulthood.
