I house a jack dempsey with other peacocks including a electric blue and have no problems. There is also 1 hap and 1 mbuna in the tank. My jack dempsey doesn't like my black convict either but she will tolerate him in the tank, just not near her, unless its feeding time. My tank size is a 125g though. My jack dempsey doesn't bother any of the tankmates.
...I did have a electric blue I got rid of that was meaner than my jack dempsey though...so it all depends on the individual fish, it could work out, it could not...good luck!