Mine is a coral beauty he is fine with most coral but he did take a liking to the one acan I put in the tank, it was the same with the other coral beauty I had that killed my plate coral. I found that once they started really picking at something they didn't leave it alone until it was dead or I took it out, luckily it only ever happened with those two corals.
I think the angels are worth the risk although they can be a bit agro toward one or two fish.
Why would you want to take everything out?
One of the worst fish I ever put in my nano was a goldie he just never suited the tank I think they need bigger tanks.
Maybe look around for some nice gobies, a pygmy wrasse, a hi-fin perchlet or a pair of fire fish.