Where are you getting the tank from? How will it be constructed? What will the dimensions be?
I would stay from RTC, it will get big and eat everything.
Megladoris Irwini and Oxydoras Niger would be good additions for bottom dwellers.
i meant crocodile catfish/bagarius suchus and i dont know where im getting the tank from or when but would a wolf fish or black wolf fish work in my group?
It will work until it doesn't. Meaning, nothing is 100% certain when dealing with many of the fish you would like to keep. You can at most make an educated guess based on the best information you can gather... And then roll the dice.
ok so the combination is african tiger fish vittatus , black arowana, either crocodile catfish(suchus) or niger catfish, congo bichir, vampire payara and either black wolf fish or wolf cichlid hows that sound good or bad?
You're stocking a tank that you don't have, don't know if you can get, and don't know when you will be able to get it? What are the dimensions going to be if you do get it?
IMO,...bad. The suchus is a whitewater species requiring a lower temp and higher DO than tropical species. Plus, a cigar-shaped bichir will eventually become part of the suchus's menu. Quick shiny fish will (ATF/payara) will invoke hunt instincts from the wolf fish.
When is this 2kgal tank arriving? If it's not ordered yet, this is a good time to do your own research on species you're interested in. These 'would this work?' threads are tedious and only show that no research was performed prior to asking uninformed questions.