As others have pointed out, corys should be kept in schools, and neons will
eventually be eaten by the angelfish. Lemon tetras get to be a little bigger
than neons, so they might be okay, but if they're small, and the angelfish are
big, look out!

The platies and guppies are probably the most suitable fish on your list.
Ordinarily, I'd worry that they'd reproduce so fast they'd take over the tank,
but with angelfish in the mix, that's not a worry. The livebearers will
provide live food for the angels. And platies will make short work of any hair
algae that dares to grow in your tank.

You might consider rainbowfish. They might not look like much in the pet
store, but once they are well-cared for, in your own tank, they are stunning.
And they are large enough that they can stand up to angelfish and gouramis.
They are active, but not so hyper that they'd scare sedate fish like angelfish
and gouramis.


Leigh

http://www.fortunecity.com/lavender/halloween/881/