Anybody espousing that belief is a heretic.<<<
Thank you for the compliment.
"A heretic is a man who sees with his own eyes." Gotthold Ephraim Lessing
More specifically, and accurately in this instance, a heretic is one who denies the Word of God, the original canon as laid out by the Early Christians, via the Apostles, and their successors.
All Christians until the 16th century accepted the full canon as determined by the Catholic Church, and even today, most Protestants still accept the NT canon as the Catholic Church defined it.