Can a jaguar cichlid pair be kept with a clown knife?

I have a 15" clown knife that I have had for about 3 years now in a 225g tank by himslef and I want to get just 2 more tankmates for him? I have always wanted a jaguar cichlid pair, and I finally found one for a great price. The male is 13", and the female is 10". I wanted to see if they are compatable? The knife fish is hand fed, and eats on ghost shrimp, and bloodworms. The tank has a bunch of rockwork, and driftwood, and I actually have 4 filters for this tank. The temp is kept at a constant 82 degrees, and I do a 10% water change 2 times a week. If this is not a good idea, do you have any suggestions on what to get for a tankmate for him. Thanks.