If you want a species pick out a large new world cichlid or a South American or Asian style tank. Here is some stock list. Also what's your tank dimensions?
Stock 1- New World Cichlid
1- Oscar
5- Silver Dollars
1- Stripped Raphael catfish
Stock 2- New World Cichlid
1- Severum
1- Blue Acara
5- Silver Dollars
1- Stripped Raphael Catfish
Stock 3- South American
2- Angelfish
9- Cardinal Tetra
9- Rummy Nose Tetra
8- Cory Cats
1- BN Pleco
1- Bolivian Ram
Stock 4- Asian
8- Giant Danios
3- Clown Loach
8- Pearl Danios
4- Siamese Algae Eaters
1- Kissing Gourami
Stock 5- South American
2- Bolivian Ram
10- Cory Cats
8- Silver Hatcetfish
10- Rummy Nose Tetras or Penguin Tetras
1- BN Pleco
2- Angelfish
Or you could do a wet pet
Look into Red Devils, Midas Cichlid, Jaguar Cichlid, Frontosa. Do you like any of those?