Corys like habrosus and those other panda like dwarf corys should be fine in you 10 gallon but those usual ones like aeneus or sterbai would need to be in 20 gallon as well as gouramis. If you really want gouramis, sparkling gouramies are perfect choice. I keep a breeding and mated pair in my tank and it is really fun to watch them.
And as Freshie has said, celestial pearl danios are good choice as well, very colourful little fishes. Neon tetras are great as well and will do in room temperature and will colour up nicely as well. Single male betta is a great choice as well, they have really good derpy personalities!