Not certain about the Pakistanis, but I've seen all of the others you mention in reefs. A shop near me has a 500 gallon display with a raccoon butterfly who keeps majanos in check. Semilarvatus and emperors carry some risk; the angels are probably better with SPS than LPS. Watanabei is about as reef safe as an angel can be, and among the prettiest Genacanthus!
~Bruce, who has a flame and coral beauty in his display, and a regal and yellow longnose in his QT