Which figure is associated with the concept of the second coming in early Adventist history?

The figure closely associated with the concept of the Second Coming in early Adventist history is Ellen G. White, originally known as Ellen G. Harmon. She played a pivotal role in the founding and establishment of the Seventh-day Adventist Church and was a prolific author and speaker. Ellen G. White emphasized the imminent return of Christ as a central tenet of Adventist belief, influencing the movement significantly with her visions and writings. Her seminal work, "The Great Controversy," explores themes of Christ's return and the end of the world, capturing the urgency and importance of this doctrine among early Adventists.

Her contributions shaped the Adventist understanding of the Second Coming, making her a cornerstone figure in this aspect of the church's heritage. This focus on the Second Advent was one of the distinguishing characteristics of Adventism, aligning with the broader Millerite movement that preceded the establishment of the church. Other figures may have contributed to the movement's formation, but Ellen G. White's impact on the theology surrounding the Second Coming was profound and far-reaching.