Will this mix of fish work in a 500 gallon aquarium?

Im thinking of getting a 500 gallon aquarium from craigslist and I would like to have this mix of fish in the 500 gallon aquarium heres the mix. Adult tiger oscar, adult ompok bimaculatus or if an ompok is to small and might get eaten how about a adult brown bullhead catfish would that be a good replecament for an ompok catfish, adult giant bumblebee catfish bufonius, and a adult true giant gourami. Do you guys think that mix will is a good mix or is it not enough space and would it work out?

I am actually just talked to some other people and they said I need a 900 gallon aquarium thats at least 10 feet long I know its alot of money and responsibility but its my dream tank and fish but when I do get that size tank what catfish would be better a brown bullhead catfish or a vulture catfish? Also do you guys think a tiger oscar,giant bumblebee catfish, ompok bimaculatus, and ornate pimelodus work in a 300-320 gallon aquarium thats the aquarium I will probably start with.

I meant keeping the vulture and brown bullhead in the bigger tank.

Also I discovered this species of catfish that seriously fish said could get along with giant gouramis its called a wide head catfish/clarotes laticeps and I was wondering if I could keep a giant gourami and wide head catfish in a 900-1000 gallon aquarium do you think that would work?