It's often said to new Apprentices that many of the greatest deeds of the Grey Order will never be spoken of, and while that was true for the Empire at large, the exception was among other Grey Wizards. Algard and his Towers of Screaming Death, which reliably draws in Chaos warbands who seek the forbidden tomes supposedly encased within and walk right into Imperial Army ambushes. Kurtis Krammovitch, double agent turned triple agent turned quadruple agent turned unofficial diplomat to the Hedgefolk, who technically breached the Articles but fought sorcerers and necromancers for new recruits in areas where the College's influence didn't otherwise reach. Walther Kupfer, who fomented civil unrest from the slave pits of Clar Karond and caused inter-house feuds that still periodically explode into violence to this day.
And Wilhelmine von Bucht, who shattered the House of Goellner when they thought their trade empire had made them too powerful to tax, who dismantled every Smuggler Guild from Middenheim to Fortenhaf, who concealed the Imperial Regalia and forced the just-deposed Dieter IV to retreat to Talabheim without performing one final theft. Who in the twilight years of a successful career settled down to serve her College as Bursar. Who is now sitting across from you and offering you a nice cup of tea.