I have 2 peacock bass with my HBRTG aro and other fish (see my sig). There have been no problems so far but the pbass are starting to take little runs at the other smaller fish (getting aggressive). They are about 8" long.
I have a 270g tank that they will be going into soon with the 12" tinfoil barb, 8" severum and 8" endi bichir. Hopefully the pbass won't eat my bichir!