Depends on the length of the tank and scaping. Auratus are irritable but no worst than zebras. They will mind there own business if they have a place they can call home. Now johannis are just nasty by nature no matter how much length the tank.
That tank is too small for those Haps. GoofBoy gave pretty sound advice :thumb:
the above advice is the best you could have. d. comps. grow up to a foot, and will happily eat smaller fish. also their eye biter name isnt just thrown around for no reason. i had one that reached 7 to 8 inches when i got rid of it, ate the eyes of my pleco right out of its head. the plecos still alive. and as for the agression in auratus, i dont ever have problems. the ones i have are still younger, at only around 2 to 2.5 inches, but never bother anything.