NO!!!!!
pike cichlids can rach up to 3feet long. a peacock will get about 6" max and make an expensive meal for that pike.
pikes are very aggressive perscivores, and eat anything that fits in their mouth.
peacocks can be very lucrative, since they are a more peaceful mouthbrooder 2-3females to one male can make consistent batches of fry. thats what i like about peacocks