Hi MtroBoer - no angel is guaranteed to be reef-safe, as their natural diet consists of coral-polyps...
BUT - if you can keep the angels fed, and have more than enough corals compared to angels, then you should not have to worry about this.
Many people keep angels and corals together successfully....
It's just possibly a case of angels possibly chowing LPS corals..... I have 2 pygmy angels (coral beauty and a bi-color angel) in my tank - and they don't touch my corals....