Among modern critics who believe in the attributed authorship of the Gospels, what are their arguments?

According to the many online lectures by biblical scholars, not to mention entries in Wikipedia and other online sites, whether the experts are on either the liberal side or the conservative side of the table, they all state the four Gospels were actually anonymous works and that someone appended the names of Matthew, Mark, Luke and John to them long after the anonymous writers wrote them. The average person you talk with has no idea of this, and he or she wholly believe the actual eyewitnesses (viz., the apostles) wrote the Gospels. I am interested in the views of critical scholars who believe the Gospels were written by the men whose names are appended to them. I am not interested in purely religious answers such as, "The Holy Spirit guided the church to ascribe authorship to Matthew, Mark, Luke, and John." Would someone please 1) point me to scholars in the field of historical criticism who believe the attributions are accurate; and more importantly 2) summarize their arguments for me?