South Africa, some fish are super cheap some super expensiveWhere do u live? Don't see a location for you.
The African knife can be added to what I mentioned.
Upper jaws like palmas polli, senegalus, and delhezis will move around especially if there's food.
Puffers I would advise as a species only tank.
African biotope....African butterfly fish, bushfish, and a Senegalus or delhezi. That'll cover ur zones in the water column.
Tigers in a 60gal?? I thought they needed 180 for a group?