#1 Avoid the dwarf guorami for now. There's another discussion around here somewhere that DGs are being infected by an awful wasting disease that pretty much can't be fought.
#2, White clouds are temperate, and so prefer unheated tanks. They're hardy, so they'll do okay, but they would do excellent in a temperate tank.
All of the fish you're looking at are schooling fish, so you are going to be limited to two or three types (though you might be able to mix some to get mixed schools).
I would suggest cories (though you'll want to add them last. They prefer really stable water) for cleaning the substrate.
Maybe cherry barbs, black neons, and cories

(That's what I'd pick off of that list, at least)