There's no straight forward answer for this.
As what fish, people might like, that would get you more subscriptions on your YouTube channel.
In India we have a lot of great indigenous monsters that could be housed in a big tank.
To list a few,
Mahseer species
(Tor putitora, tor tor, tor malabaricus, tor ramadevii)
Large growing channas
(Leucopunctata, marulius, pseudomarulius, diplogramma, striata)
Large predatory catfish
(Bagarius species, wallago attu)
You will have to build your tank around what kind of fish you want, what are your available choices, and what kind of tank and decor you like.
My advice is build what you like and share.