Christ appointed these priests and they contributed to the Scripture — some in huge ways, some in small ways;
Peter, Andres, John, James, Matthew, Simon, Thomas, Jude; Phillip, James the Less, Bartholomew, Matthias who replaced Judas Iscariot.
And if you want to count Paul you can too.
Eusebius’s Ecclesiastical History shows the development and growth of the Church from the time of Acts to the 4th century.
http://www.newadvent.org/fathers/250102.htm
The egalitarian Christianity of the Radical “Reformation” didn’t exist.
Priests? Christ appointed them priests? Would you please provide the scripture where He did that?