:welcome: to AC!
I would suggest returning all but the corydoras. I'm sorry but the peacock eels, angelfish and CAE will quickly outgrow the tank in a short time. Two angelfish nevertheless will require you a 40g minimum. As cichlids, they also become aggressive when cramped for space. They can reach to 6 inches in body diameter with fins at a height of 12 inches and more which makes them less likely to turn around the 10g.
The Chinese Algae Eater can reach 10 inches despite being a slow grower with a nasty temperament. As they mature, they eventually lose their taste for algae and develop a taste for mucous membrane which is to say they will try sucking the slime coat of the other fish much to their annoyance. They will also harass smaller tankmates.
As for the peacock eels, they have the potential to reach 8-10 inches which is something you also do not want in such a small tank, let alone the fact they can eat smaller tankmates.
I would suggest adding more corydoras however sticking to about four and then some small species of tetras such as Hyphessobrycon amandae. If not, there are the celestial pearl danios (Danio margaritatus), Boraras merah, Boraras espei, Sawbwa resplendens and some pencilfish. I think that's all you can place in there. You have the option for sparkling gouramis if you really like them.
Good luck.
