Do i have too much fish?

I have a 20 gallon planted tank. Originally i had 15 neon tetras with 5 yoyos and 2 algeaeater. I rescuced 2 honey gouramis, from my LFS. They were in horrible condition, i could not leave them there. It's been a week since i transfered them to my main tank, afrer no signs of disease. Everyone seem alright, no fighting. Just my yoyos playing sometimes, chasing other fish, but never biting or harming enyone. Water parameters not changed, nitrit and ammonia levels did not rise. I have many plants, but in the middle a big open space is enough for the neons to group up amd swim around. Could this many fish be in one tank? Or in the long run it will be too much? Also i have maybe around 10 shrimp in the aqua.