they're all reasonably small fish so as long as the tank is well aerated and plenty of place for them to hide around eg plants, rocks and driftwood to make the feel safe and not stressed u should be able to have a lot more.
my 3 foot which is just over 200L has at the moment 15 zebra danio, 15 pearl danio, 10 young kribs, fire eel, 2 breeding pair of convict one striped one white [trying very hard to catch these out as they're creating havoc :roll: ] which means hundreds of frys, breeding pair of BN and some random guppies and killies.
so what else do u want in ur tank?