I would forget the butterflies. You will not be able to keep the nitrates at 0 to keep the butterflies healthy and alive.
All of the other fish, especially the puffer/hawk, lion, and eel will be way too much of a bioload for the butterflies.
I would do:
fuzzy dwarf lion
SFE
blue spot toby puffer
flame angel
Even then, you are going to have nitrate issues if you do not keep up with water changes and get a good filtration system in there.