He lent his voice to a wide range of characters—from stoic heroes and tragic figures to comedic and animated roles. What set him apart was his incredible adaptability: he could portray strength, sorrow, wit, or fear simply through intonation and phrasing. For many his voice became more recognizable than the faces on screen. Beyond dubbing, Ghanbari also contributed to radio plays and audio dramas, which were extremely popular during the pre-revolutionary era. These productions were essential cultural fixtures in Iranian households, and Ghanbari’s presence in them elevated their status and artistic credibility.