I actually dont know about any other rasboras sorry, but you can do quite a few guppies, id get all males so you dont have to deal with babies. Maybe 10-15 guppies if you have them selves alone.
I'm surprised no one has pointed at a betta setup. Bettas are loaded with personality and would consider a 10g a nice home. You could probably add in a few friends as well.
OK after seeing a video of a betta with about 6-7 rasboras I have made up my mind! This is the setup I'm going with, maybe add a couple ghost shrimp cause I think they look cool but the betta may have them for lunch