I would say there are three classes in wt doctrines here, 1) The 144 000; --2) the Great after Armageddon Crowd, 3) all those that died before Armageddon, that are resurrected to Earth, aka OS.
In Jw's mind, those witnesses that die now were wrongly called members of the great Crowd, but were definitely Other Sheep.
Would not any member of a Christian church, not of the wt 144 00 , that died be an OS too? since until 1918, the members of all those churches were considered more or less "True Christians" under scrutiny ..,--- until they were rejected by Christ in favour of Rutherford Inc? and:
is here a name in wt parlance that is a catch all for general resurrection candidates?