Two at most in a 30, maybe a few Corys too
If you want quantity, I would say neons, tetras, guppies, mollies or something like that. I prefer fewer but nicer fish, but that is personal preference.
Go for mollies then! They reproduce A LOT, and there are soooo many varieties!
I said MAYBE 2 angels, and mollies INSTEAD, not together. They wanted to know more fish if not Angels.