I agree the clowns are a good idea, but I disagree about the Longnose. This butterfly in my experience among the least demanding and would be quite happy in an established and stable 75gal. I'm actually more fond of the Longnose than the yellow tang, which I've always found often quarrelsome and moody unlike the usually passive Longnose.
I've had mixed results with Klein's or the similiar Racoon. The copperband is however a high risk fish as far as I'm concerned and not a good recomendation because of it's fickle hardiness record. Considering the high fatality rate of this fish I have no idea why it's even imported. A school of flame gobies is just as pretty and far easier to take care of.
Triggers are for FO
tanks, and even then the Niger seems to stay out of trouble and be more community compatible than the Huma-Huma.
Dwarf angels are one of the reasons I stay in this hobby. Wonderfull fish for an established 75gal.