What do you suggest on my hexagon fish tank(50 gallons)?

Recently acquired a 50 gallon hex tank. I have about 10 small fish(mollies,fancy guppies...etc) and 2 snails. Its decorated at the bottom with fake environment pieces but leaves a lot of space. Was wondering if there are any pieces out there that I can use to fill some of the rest of the space. Was trying to find multi tier decor but having trouble. Also, do you think a couple angels would be ok with the commnity present. New to this, so looking for suggestions on making the best result for this hexagon tank