Ubaydallah ibn Abdallah ibn Tahir was the last major Tahirid to hold high office in what dynasty?
Ubaydallah ibn Abdallah ibn Tahir Abu Ahmad Ubaydallah ibn Abdallah ibn Tahir (Arabic: أبو أحمد عبيد الله بن عبد الله بن طاهر‎ ‎ , ca. 838 – May 913) was a ninth century Tahirid official and military officer. He was the last major Tahirid to hold high office, having served as the governor of Baghdad at various points between 867 and 891.
Abu'l-Fadl ibn al-'Amid Abu 'l-Fadl Muhammad ibn Abi Abdallah al-Husayn ibn Muhammad al-Katib, commonly known after his father as Ibn al-'Amid (died 970) was a Persian statesman who served as the "vizier" of the Buyid ruler Rukn al-Dawla for thirty years, from 940 until his death in 970. His son, Abu'l-Fath Ali ibn Muhammad, also called Ibn al-'Amid, succeeded him in his office.