Алишер Навои
Being mostly followers of the spiritual traditions of Islam loosely referred to as Sufism, these groups were sometimes distinct from the "Ulma" or officially mandated scholars, and often acted as informal missionaries of Islam. They provided accepted avenues for emotional expressions of faith, and the Tariqas spread to all corners of the Muslim world, and often exercised a degree of political influence inordinate to their size (take for example the influence that the sheikhs of the Safavid had over the armies of Tamerlane, or the missionary work of Ali-Shir Nava'i in Turkistan among the Mongol and Tatar people).