In my ongoing research among offshoots of Armstrongism I came across Triumph Prophetic Ministries, founded by the now late William F Dankenbring. He passed away in August of 2017 according to the front page of their website. [Update January 20th 2021: as you can read in my comment below, the site would go offline at some point this month. That has happened, and therefore the link is disabled.]
