Well I know that the labs and acei are fine to go together but I'm pretty sure that haps need to be or at least thrive in an all hap tank. There are many many species that are compatible with labs an acei's like melanochromis, pseudotropheus(acei family), labidochromis(yellow lab family), and labeotropheus are just a few that are commonly compatible together. Just do your homework before buying and you should be fine.
And whatever you end up getting try to keep a ratio of 1 male to 3-4 female of each species.
If it is an electric blue jack Dempsey then defiantly not your tank is to small and they are not compatible with the other fish. If it was an electric blue Johanni, some people get away with stocking them with other cichlids but generally they are hyper aggressive and are not recommended. If its the "electric blue cichlid" that comes up on petsmarts website then that is a hap.