I think discus and SW
would be quite ambitious and challenging. I have two 20g long tanks. One moderately planted with red cherry shrimps/snails and one heavily planted with one Amano shrimp, snails, and 3 danios and 4 golden tetras.
Always wanted a shrimp tank; Shrimp have been there a year and it is very low maintenance. They just crawl around and do their thing.
The fish in the planted tank have been there for quite a while (danios 2 years, tetras 5+ years). The fish are active and hard to photograph (clearly). Got the tetras because I have not seen that type in pet stores. Got the danios as dither fish to liven up the tetras because they were reclusive. Fish on the WISH LIST are thread fin rainbow fish and Khuli loaches. Here are the tanks: