Very nice looking tank!
+1 on changing out the neons. To that end, black neons or glowlight tetras are larger and will give you an iridescent reflection in your tank, only in orange or gold rather than blue. I'd shoot for a target of 10 or so, which will be fine in your tank.
I wouldn't worry about the mollies reproducing too much. The angel will pick off the baby mollies one by one so that very few, if any, will live to be adults.
Finally, most of the albino cories in the hobby are Corydoras aeneus, the bronze or green corydoras. Both are used as a common name, which I think is highly dependent on where you live. Anyways, if you wanted to change it up and get 3 or 4 normally colored C. aeneus they will school with the albinos and give you a little variety.
I wouldn't hesitate to increase the tetra school size to 10 and add 3 or 4 more cories myself with the filtration and plant growth you have.
WYite