I don't think you will receive any responses with a YES. The stocking list is unrealistic. Snake Heads are illegal in many areas in the US. Gars...not suitable for aquariums. The Oscars would be torn to shreds along with every fish in the tank.
Flower horns should be housed in tanks to themselves as I understand it.
I have moved your thread from Hot Topics to Aquarium Stocking Questions.
Excellent advice above. I think you should rename the thread "Death By Unrealistic Expectation". (kidding)
No I'm sorry but none of those fish belong together & as has been pointed out the Gar just doesn't belong in an aquarium at all. The Gar would just eat everything & then proceed to outgrow the tank. They get to something like 10ft long. Even a huge public aquarium is going to think very seriously about whether they can house one of those or not.