Welcome to fishLore!!!
Three clown loaches( they need buddies), fifteen to twenty blue danios( they do better in large groups, about three gouramis, one clown pleco or one leopard pleco. The clowns are too rambunctious for corys. they won't so much hurt them as run right over the top of them while playing.
Out of these the clowns are the only ones I couldn't do without. I have clowns now and they are wonderful.
the way I came to these suggestions is that they all swim at different levels the majority of the time and will give your tank a busy look. just some suggestions
Carol