Hi Ty, and welcome to Tropical Fish Keeping forum.
More plants, and more fish. Just what most of us like to hear.
I would move the three swords apart, as they will grow out once they are settled. Don't space them equidistant from themselves or it will draw attention to the fact, and the tank perimeters. One can stay where it is now, another can go behind the slate on the right, at the back but out from the wall so the plant is right at the edge of the slate, and the third in front of the middle rock formation just in front of the right hand piece, to the left of that fish in the photo. Hope this all makes sense.
Then, some short plants, and here I would suggest pygmy chain sword or chain sword. [Click the shaded names to see the profile with photos.] This keeps the sword plant theme, and that helps unify an aquarium. This plant as the profiles mention will spread quite rapidly once established. And some floating plants. Water Sprite is one of my favourites, but almost any will serve. Floating plants are important for water quality but also to provide a bit of shade which all these fish prefer. They will be more colourful and out more with floating plants.
Another good plant is Brazilian Pennywort. This is a stem plant that can be grown planted in the substrate or floating, or planted and allowed to grow up to and across the surface.
I would also suggest some wood, chunks of bogwood like Malaysian Driftwood, which is very natural to the habitats of all these fish.
On the fish, add more corys. I don't know what species you have, but they should be in groups of five or more, and you have space. You can mix species, they all get along well. If you do mix species, try to get no fewer than 3 of any one species. They are highly social fish and need company or they will be stressed.
Our fish and plant profiles are under the second heading from the left in the blue bar across the top of the page, and the corys are under catfish. When fish or plant names are exactly the same in a post as in the profile, they shade and form a link to the profile.
Hope this helps.