Yep, you need to avoid all small fish with Silver Dollars in the tank, the dollars can hit adult size so rapidly its not even worth starting out with small fish.
If you can find a supplier with slightly older fish, Celebes Rainbows can hit 6-8cm, twice the size of your biggest neons...
But I think you'll be risking it with any smaller tetras....
How about Buenos Aires Tetra, Red Eye Tetra or Columbian Tetra? These all reach reasonably good sizes and larger than most tetras. I love the Buenos Aires and you can get an Albino variation too.
I think Id be more tempted to look at Kutubu Blue Rainbows, or the Splendida Australis Rainbows, they are active, shoaling and a sensible size.
Saying that, some of the barbs would look good too! I would avoid Tigers as they are nippy and will most likely go for the angel...
Denisoni Barbs (also known as Torpedo Barbs)
Maharaja Barbs
If your tank is running at the lower end of tropical... (about 23 deg C) you could try:
Gold Barbs
Odessa Barbs
Rosy Barbs (Fire Barbs)
Giant Danios
Moustache Danios
M.Praecox is the scientific name for Neon Dwarf Rainbows
