I had EBJDs for years and I kept mine with the following. And Electric Blue Dempseys aren't NEARLY as aggressive as normal jds. Try to stay away from very aggressive species like Jaguars and Guapote, Jacks, Green Terrors, anything Amphilophus, Convicts, African cichlids
Angelfish
syno catfish
Firemouth
Guppies
platys
Blue Acara
Earth-eaters
Raphael Cats or Pictus
Barbs
I could be forgetting some