Like Cicero or Demosthenes or Plato or Thucydides or Tacitus, Quintilian would be a great man if he lived in our times, and could proudly challenge the modern world to produce a better teacher than he in the art of public speaking.
Quintilian is a Latin classic, and belongs to the class of rhetoricians.
He should have been mentioned among the orators, yet, like Lysias the Greek, Quintilian was a teacher of eloquence rather than an orator.