Not a hope.
Even really large predatious fish would struggle to swollow one never mine a Peacock.
What species do you intend keeping.
I have kept over twenty different species of Syno and I might be able to give some advice
on the species you intend keeping.
My favourite would be a group of Petricola. Not overly aggressive and wont effect spawning
cichlids like the Multipunctatus.
I got 5 of petricola 1 1/4 " last week. Guess what... my peacock and hap go after them soon as i put them in my tank. 10 mins later. Ony one left.Well but my peacock and haps are full size . Most are 4" to 6 ". So good luck
I've had multipunctatus with male peacocks and haps, and now have lucippinis with a colony of blue orchid peacocks. I've never had an problem. I rarely even have any interaction at all between the top groups . . .