What other fish can i add to my tank?

its 4 ft. i have anubia, java fern and java moss and is fairly planted. i have 12 neon tetras, 4 baby bristlenose catfish (very small, i know they grow) 2 julli corys, 3 butterfly loaches and some cherry red shrimp. what else can i put in there? i really like the tetras as they are very colourful. so any other colourful fish i can put in there compatible. or maybe a different shaped on. something like a dwarf gourami but i know they can be aggressive.