The current position is that "Other Sheep" living during the "Time of the End" are the great crowd. I've been watching for any signs that this position may be weakening, but don't see any yet:
Finally, in 1935 the other sheep living during the time of the end of this system of things were recognized as being the great crowd seen in vision by the apostle John. (Isaiah's Prophecy II p. 255)
But on May 31, 1935, in a discourse given at a convention of Jehovah’s Witnesses in Washington, D.C., U.S.A., it was Scripturally explained that the "great crowd" ("great multitude," King James Version) refers to the "other sheep" who live during the time of the end. (The Watchtower February 15, 2003 p. 19)
Those of the other sheep gathered in the time of the end will make up the "great crowd" destined to survive "the great tribulation," with the prospect of living forever on a paradise earth. (The Watchtower February 1, 2002 p.21)
In a stirring talk on "The Great Multitude," delivered to about 20,000 conventioners, J. F. Rutherford presented Scriptural proof that the modern-day "other sheep" are identical with that "great crowd" of Revelation 7:9. (John 10:16) (The Watchtower May 15, 2001 p. 15)
Who are marked on the forehead by that "man"? "Other sheep," ones who have the hope of living eternally on a paradise earth. (John 10:16; Psalm 37:29) In 1935 this group of "other sheep" were discerned to be the "great crowd . . . out of all nations" seen in vision by the apostle John. (Revelation 7:9-14) (The Watchtower January 1, 2000 p. 12)
The "As a group" caveat would only account for those who have died prematurely. They don't seem prepared to create a third distinct class of Christians yet.