We have a rekord 120. I don't know if 4 gourami's and angelfish will be too much for the tank? I have 4 angelfish and a few people were saying that was borderline!
Anyway don't get neons! We had a nice shoal of 16, who lived happily for about 5 months until one angelfish decided he liked neons, and ate them all except one!
We have guppies in there though, who aren't bothered by the angels at all (not sure how they get on with gouramis?), they are really playful so fun to watch, and we also have lined barbs, who are not as nippy as other barbs, so they are fine in the tank, but any other barbs will be too nippy.
We were going to look for some other small fish to replace the neons, obviously something a bit bigger than neons. I was told that any fish bigger than a neon would be fine. Although we've decided to wait and let the angels grow, we're moving after Christmas anyway and the tank is quite happy now, so don't want to disrupt it!
We also have algae shrimp, which are right little characters now they've grown and settled in! The biggest one has started stealing food from the fishes mouths!
Hope you find some nice fish!