Mine were babies when I introduced them to my tank which had neons already, and once the angels grew (and they grow quick) all the neons became lunch. So the whole 'grow up with them, don't see them as food' definitely didn't work in my case. My recommendation is go for bigger, broad bodied tetras or barbs for a schooling fish if thats what you want.
In with mine in a 450 litre are severums, blue acara, kribensis, blue ram (being rehomed soon, tank is a bit boisterous for her), Black skirt tetras, Odessa barbs (beautiful, non-nippy barb that doesnt get too big),corydoras, bristlenose, kuhli loaches and clown loaches. My black angel picks a fight with the acara and the severum on occasion but its generally just a whole lot of flaring and shaking at each other, with no actual damage eber done to anybody.