Is there any nano angelfish looking things?As said above, that stocking will not work well. But there are some very cool looking nano fish out there that would do well in a 10 gallon. You could definitely have your guppies, or endler guppies.
You could also go with Sparkling Gouramis, Shrimp, (So many cool colors of shrimp. Oh. My. Gosh.) Scarlet Gem, Pea Puffer, Bumblebee Goby, Celestial Pearl Danios, Bluefin Killifish, etc. Nano tanks are seriously one of my favorite things in the world. Can't wait to see which direction you go with the tank!
Not really, sorry. A king betta would love a 10 gallon. The best suggestion I have is to either settle for a small tank with a different fish or upgrade to a 20 minimum.