if ur referring to the pike cichlid then no he dont take crap from most of the fish but the dorado keeps him well hid... he comes out sometime and the dorado makes him pay..
I dont know how long the peace will last in that tank...also the natives should be kept cooler than the tropicals, closer to 70 degrees. They will be able to handle the warmer water for awhile but eventually it will start to take a toll on them.
alot of are native love 76 to 78 degree water... the pond behind my house is really warm and the bass stay in 1 foot of water.. same with pikes catch them in 2 feet of water in the weedbeds..maybe trout or salmon those kinda native dont like the warm but the ones i have do...