For many years the WTS identified only anointed as members of the Christian congregation (and only as Jehovah's witnesses with the other sheep being relegated to "companions" of the anointed.
The Christian congregation consisted of only Christ as the head and the 144,000 as the body. No room for the great crowd/other sheep. I had a comment about this on JWN with quotes; I will try to find it.
*** Paradise Everlasting book (1989) chap. 14 pp. 125-126 Who Go to Heaven, and Why? ***
THE CONGREGATION OF GOD
17 The Bible tells us that Christ is the head of God’s congregation, and that its members are subject to Jesus. (Ephesians 5:23, 24) So the word “church,” or “congregation of God,” does not refer to some building. Rather, it refers to a group of Christians. (1 Corinthians 15:9) Today we may speak of the congregation of Christians with whom we associate. In the same way, we read in the Bible about “the congregation of the Laodiceans,” and, in the apostle Paul’s letter to Philemon, about “the congregation that [was in his] house.”—Colossians 4:16; Philemon 2.
18 However, when the Bible speaks of “the congregation of the living God,” it is referring to a particular group of Christ’s followers. (1 Timothy 3:15) They are also called “the congregation of the firstborn who have been enrolled in the heavens.” (Hebrews 12:23) So this “congregation of God” is made up of all Christians on earth who have the hope of heavenly life. In all, only 144,000 persons finally make up the “congregation of God.” Today only a few of these, a remnant, are still on earth. Christians who hope to live forever on earth look for spiritual guidance from members of this “congregation of the living God.” The Bible also refers to this congregation of 144,000 members by such terms as “the bride, the Lamb’s wife,” “the body of the Christ,” “the temple of God,” “the Israel of God,” and the “New Jerusalem.”—Revelation 21:9; Ephesians 4:12; 1 Corinthians 3:17; Galatians 6:16; Revelation 21:2.