You could try the commonly available dwarf types of gourami.Would there be Gouramis that would work
If you go with cichlids, I’d recommend keyhole or rainbows. For schooling fish I’d go with columbian tetraI have a 55 gallon fish tank with 2 angelfish (that aren’t breeding) and 4 corydoras. I have kept them for about a month and the tank is kinda dull. I want a little more action in the tank