It really depends on the fish.... I have never seen an agressive GT or JD.. In my opinion they cannot hang with the truly agressive cichlids at all... I would be doubtful if any of those pikes would stand a chance either.. If you get a mellow dude then everything will be fine.. but that is a big if... Xperience really tells me it really all depends on the fish... Me and my gf have a pair of dovii a huge midas, pike cichlid, huge GT.. parachromis fredristal.. smaller red devil/midas.. texas cichlid.. all together in a 120 and they are pretty much fine..
In the 75 gallon though with juvenile cichlids 2-4 inches.. the flowerhorn kills everything.. He killed an umbee, grammodes, and there is constant fighting in the tank.. IT started out with an umbee, grammodes, FH, convicts, two festae, and a red devil.. I know this combo would not usually work or maybe ever but the first combo in the bigger tank shouldn't work either..
Trial and Error.....