The following are, I believe, relevant exerpts from wikipedia, its article on "History of the Seventh-day Adventist Church". It shows that several of what we know as Watchtower leanings were not unique, originated by Russell, but were borrowed from other religions.
The Seventh-day Adventist Church had its roots in the Millerite movement of the 1830s and 1840s, during the period of the Second Great Awakening, and was officially founded in 1863. Prominent figures in the early church included Hiram Edson, James Springer White and his wife Ellen G. White, Joseph Bates, and J. N. Andrews. Over the ensuing decades the church expanded from its original base in New England to become an international organization. Significant developments in the 20th century led to its recognition as a Christian denomination.
You can see that being founded in 1863, this group preceded the movement by C.T. Russell. Note also the similarities in how they (and other well known contemporary churches) felt about "church traditions" and how the Watchtower felt about them. Clearly, Russell "borrowed" these feelings, then adopted them.
Adventists viewed themselves as heirs of earlier outcast believers such as the Waldenses, Protestant Reformers including the Anabaptists, English and Scottish Puritans, evangelicals of the 18th century including Methodists, Seventh Day Baptists, and others who rejected established church traditions.
Len
ps: Oh, we must never forget Russell's ties and allegiance to William Miller in the early pages of Zion's Watchtower. He called him what I would describe as an elevated title, "Father Miller" no less than 4 times in those early issues despite the failure of his 1840's prediction. Russell still believed in the merit of his basic premise of Christ's return (changed to presence).