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According to Russian church records, four others held office before 1800:
Ignatij Smola held office September 8 - October 1, 1721
Innokrntij (Nerunovich) held office November 25, 1732 - July 26, 1747.
Sophonij (Kristalevsky) held office April 18, 1753 - March 30, 1771
Michael (Mitkevich) held office August 2, 1772 - August 1, 1789
Benjamin (Bagranskij) held office September 9, 1789 — June 8, 1814
By the way, the Russian Orthodox Church considers not Ignatij I but Varlaam Kossovsky to be the founder of this diocese.