Twist Hummingbird

Is this a good setup for my 55 gallon tank?

5-Congo Tetra
1-Red-Tailed Black “Shark”
2-Gardneri Clown Killifish
1-Hummingbird Tetra
3-Red-Line “Shark”
1-Peppered Corydora Catfish

The tank will have plenty of hiding places made out of slate. And the bottom will be cover with black sand. For plants There will be java fern tied to pieces of driftwood. [...]