I would suggest other Gourami's but not Honey as they are similar to the Dwaft Gourami and can be known to fight. As Kay has said the Angels when old enough my take you neons as dinner rather then a tank mate.
Do not get any Barb as they will eat the Betta (fighting fish) as Barbs are fin nippers. Dont introduce any more sharks either and don't bother with Silver Shark as they will grow too big.

I would recommend
Tetra, I like congos, tetra are a good community tank species
Livebearer such as Platy and Swordtails NOT guppys are the Betta could kill the males as they have fancy fins like him.
Glass catfish!! I love them!!
Prehaps some Kribensis or Rams, these are dwarf Cichlid and they get along peacefully with most and if you get a pair make sure to offer them plenty of spaces to make a nest.

Going back to the discus they wouldnt be happy with the Shark, as they are a fast darting fish, prehaps the Gouramis could bother them too.

Emma x

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