Sun coral (must be hand fed), open brain (feed this too), shrooms
& ricordias, Xenia, frogspawn/hammer, star polyps ... How tall is your tank? I think you could keep quite a bit with 4wpg, especially if you've got a 24" or less tank height.
I've just updated my gallery with pictures. Most of the high light corals that I have are up high. The frags
have all been there since January and are all thriving. I'm currently running with roughly 2wpg.
You probably can't do SPS
with blues and purples without MH
but yellow, orange and green SPS
you should be able to carry.