Samuel Ruiz
In 1962, the Second Vatican Council (1962-1965) convened, focusing on the social responsibility of Christians and on opening the Church to theological development and dialogue. Vatican II encouraged that sermons be translated and read to communities in their local languages and that the Church be more involved in addressing social problems, such as those occurring in Central and South America. For Ruiz, his participation in the Second Vatican Council allowed time for reflection on the decisions and actions carried out under his administration, which brought him a long way from the somewhat naïve enthusiasm which he’d had during his first years as bishop. It was Vatican II which inspired Ruiz to translate scripture into local indigenous languages and into practice, with an emphasis on inculturation.
Thomas Roberts (bishop)
Roberts attended the Second Vatican Council ("Vatican II"), held from 1962 to 1965, but he never managed to speak on the council floor. In the secnd period (autumn 1963), Roberts submitted a paper asking for reform in ecclesiastical procedures affecting marriage and divorce which he claimed were cruel and unnecessarily drawn out. 
In the third period (autumn 1964), in the session on "The Church in the Modern World", Roberts submitted a shortened version of his "Continuum" paper and asked for Catholic support for conscientious objection to wars that were immoral. He cited the recently publicised case of Franz Jägerstätter executed by the Germans in World War II. He was not called to speak and conscientious objection and the question of obedience that made World War II possible were not discussed. The statement which eventually emerged in "Gaudium et Spes" fell short of a demand for unilateral nuclear disarmament but left little scope for any real conviction that the use of nuclear weapons could be justified.