I'd say sell the BN and get a small shoal of ember tetras (probably 6) or other small (less than inch long) community fish.. I think you'd be okay there.
http/en.wikipedia.org/wiki/Ember_tetra
OR
You could get sparkling (pygmy) gouramis in a 10g. Maybe 1 male and 2 female. I think maybe 1 male and 3 females are better but maybe that's overstocked. Anyone with sparkling gourami experience want to chime in?
http/en.wikipedia.org/wiki/Sparkling_gourami
Either way, you'd have some colorful top swimmers.
A friend of mine had sparkling gouramis before in a 10g - don't remember how many tho. They were really cool.