Who was a Swiss theologian and humanist philosopher that rejected the principle of transubstantiation and believed in the supreme authority of the Bible rather than the clergy?

Huldrych Zwingli was a Swiss theologian and humanist philosopher who rejected the principle of transubstantiation and believed in the supreme authority of The Bible over the clergy. Zwingli was a key figure in the Protestant Reformation, advocating for a more simplified and biblical form of Christianity.