I'd put top, mid level, and bottom dwelling fish in a tank like that. For the top, I'd get either a small aro or some archers. For mid level, I'd get bala sharks. I love balas and the sound they make when they get at pellets. For bottom fish, I'd get a clown knife (even better, get a Royal CK).
None of those fish are pansies and all will look really nice together in a 100 g tank.