3 men who called out against the Roman Catholic Church prior to the Protestant reform?

Three notable figures who criticized the Roman Catholic Church before the Protestant Reformation are John Wycliffe, Jan Hus, and Erasmus of Rotterdam. Wycliffe, in the 14th century, advocated for scripture's authority over Church traditions and translated The Bible into English. Jan Hus, influenced by Wycliffe, challenged the corruption within the Church and was executed for his beliefs in 1415. Erasmus, a Renaissance humanist, criticized the Church's practices and emphasized the need for reform through a return to original biblical texts, paving the way for later reformers.