Ali al-Husayni al-Sistani (; born 4 August 1930) is an Islamic scholar and the dean of the Hawza in Najaf, Iraq. A Grand Ayatollah, Sistani is considered one of the leading religious leaders of Twelver Shia Muslims. After the invasion of Iraq and the subsequent overthrow of the authoritarian Baathist regime, Sistani advocated for democratization instead of the system of Wilayat al-Faqih. He has likewise endorsed rule of law, Iraqi nationalism and non-sectarianism. He has been a vocal critic of foreign interference in Iraqi affairs and has warned foreign actors against imposing their will on the Iraqi people. Wikipedia
Who is popular today?