Sikhism
Sikhism does not have priests, which were abolished by Guru Gobind Singh, as the guru had seen that institution become corrupt in society during his time. Instead, he appointed the Sri Guru Granth Sahib, the Sikh holy book, as his successor as Guru instead of a possibly fallible human; and due to the faith's belief in complete equality, women can participate in any religious function and/or perform any Sikh ceremony and/or lead the congregation in prayer. A Sikh woman has the right to become a Granthi, Ragi, and one of the Panj Pyare (5 beloved); both men and women are considered capable of reaching the highest levels of spirituality.
Read more about this topic: Female Bishops