Final answer:
Quintilian's ideal orator is one with mastery in eloquent speech and fitting physical presence, reflecting the values of Roman public life and masculinity.
Step-by-step explanation:
Quintilian, a renowned rhetorical theorist from ancient Rome, considered the ideal orator one who possessed not only the skills of eloquence but also an understanding of appropriate and impactful physical expression. This conception of the orator is detailed in his seminal work, Institutes of Oratory, where he provides extensive advice on posture, gesture, and the wearing of attire such as the toga when speaking in public.
He mentions that the orator should control themselves by the poise of their upper body and by a manly inclination of the side, as Cicero also emphasizes in his work. Furthermore, oration was a vital component of a Roman man's public life and heavily influenced by social status and gender norms of the time.