I would change "few" to "two", for the species you mentioned, though you could start with 6+ to get the pairs initially. N. multifasciatus and N. brevis would be options that allow you more pairs if you wanted.
IME, cyps, even the little cyps, are oddly aggressive for being "minnows". Depending on sex ratio, the tank might not be big enough long term (1+ years), but would certainly work out for a while.