maybe gouramis would be a possibility, as for angels i have kept them before and were one of my disasters that i dont wish to repeat, even though they are attractive fish i found the ones i had became more aggressive with age, could you reccommend any particular gourami, i was thinking maybe dwarf, but i've heard of some virus affecting gouramis at the moment
At the moment gouramies do have a virus, especially dwarf gouramies. Also they will probably NOT make them shoal. I have 2 Angels and 2 Cryptoheros Cutteri in my tank with 25 Silvertip tetras - the tetras couldn't care less, infact they just spawn infront of the male Cutteri's mouth so he gets some nice protein. So yeah, I wouldn't add a big fish, you'll just have to try another species that are small and peaceful. The best I've found are Black Phantom Tetras, my 7 are always together. Also a good shoaling fish for the top are hatchets, they are very wary so you can count on them to shoal. I know someone above said Emperor Tetras but mine don't shoal at all - however they did shoal in the shop but they were in a tank with big, very fast barbs and so probably felt very insecure bearing in mind there were only 5 amoungst the many barbs. Yes, you can't go wrong with rummy-nose so I'm told and from what I've seen this is very much the case. How about Cardinal Tetras they seem to shoal pretty nicely and will stick with your neons. In short you could get -
More neons (may not shoal)
Cardinals (may not shoal, but more likely than just neons)
Black Phantoms or really any other 'diamonds-shaped' tetra (quite likely to shoal)
Rummy-nose (no personal experience but from what I've read and seen probably will shoal)
Big Fish to scare them (by personal experience I would say this idea fails but I reckon it could work if you get something faster moving, of course your tank would have to be a fair size for the fish)
Hatchets (just to add a different shape and a shoal to the upper section)
Danios (these to me work great in shoals but I feel mean keeping them in a small space and would say a minimum 2ft tank to allow them to dart about)
Anything you like! (It's your choice so go with what you like and don't let other people influence what you want!)
Good Luck!
AmazonFTW