Luananeko
Aquarium Advice Addict
A dozen Angels in a 35g sounds like a terrible idea. Large fish grow best in big tanks. 3 Angels maybe and keep the favorite.
If it was me ?
A group of Threadfin Rainbows.
Corydoras
Seal the tank well if you have Hatchets, plus some floating plants for cover help.
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+1 on the angel bit. Even as babies, 12 in that size tank will quickly need downsizing.