electric blue cichilds companions?

You could go with most any aggressive fish from Lake Malawi, such as a blue dolphin(Cyrtocara moorii), Nimbochromis venustus, most of the malawi haplochromines will do fine. Perhaps some mbuna but the electric blue is pretty aggressive. And NO dont put a puffer in the tank with an electric blue, the puffer wouldnt last 5 minutes.