Ok. Well depending on your lights, lower light plants?
Low lighters, java ferns, different anubias, java moss
Bottom dwellers, sterbai, peppered, bandits, emeralds, bronze corys? They really need a sand or micro gravel substrate or their whisker barbels become damaged.
Shrimp, ghost, red cherries, amano?
How many you can fit obviously depends on the fish. A small group of 5 corys a school of 7 tetra or equivalent, a dwarf or honey gourami and lots of amano shrimp go tackle any algea growth. I mention amanos because they grow bigger and wont be easy for a small gourami to eat.