40 gallon mini predator tank

[Lazybum34]

Hey guys I have an empty 40 gallon breeder in my basement and I want to start a mini predator tank. So far I have decided to keep
1 batrochoglanis raninus
1 amazon leaf fish
What other fish could I add that is predatory?

Any info is appreciated, thanks in advance.

 

[Arthur12]

Longear Sunfish, great colors, stay small and not shy.

 

[A201]

Maybe include a group of Tiger Barbs. Small but fearless.