For all those fish you want. you would need a 200gal tank.. So if you dont' have the room for one that big, best leave off the jag,and the white catfish.. NOW I do know that some tanks now are not as long, like my 125 gal which is 6feet long, 72".. they are now making them shorter in length, 5 feet and wider.. Please keep in mind that Oscars like to swim not stay in place and if you can find a tank that is longer than 5feet, your bigger cichlids wil be happier.. Most tanks now are only 4 feet long but wider at 18 to 24 in.. So if you want to keep some nice cichlids, like the Oscars and get a pair, best to get at the start a 125 gal to a 150.. And this is going to get crowed once they spawn AS they might kill all the others in the tank.. Any time you get pairs, they fight to keep the young alive, which places everyone else in danger..
NOW another choice for you, IF you want just the Oscars then a 120 wil do you good.. But that is just a 48"x24"x24"..
And what are you going to do with the baby Oscars?? Another tank is needed.. Mom and dad dont' tolerate them for long periods.. They will spawn again and will eat them as now they are a threat to the new nest..
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IF you want to TRY your combo suggested, MINUS one Oscar, then a 150 OR 180 gal and up is going to be needed.. This wil give them all room to grow and get along better.. The 150 is 72x18"x28" the 180 is 72"x24"x24"..
SO on your question of your combo working together??? YES, WITH some left off..NO pairs....
ON the tank size being big enough for what you want??? NO,,, not really...


