Answer: Cyrano de Bergerac
Steve Martin plays C.D. Bales, the Fire Chief of a small Washington state town. While eloquent and charming, C.D. has a large nose that saps his confidence around women. A beautiful astronomer played by Darrel Hannah, Roxanne, moves into town. C.D. is attracted to Roxanne; however, he believes he is not good looking enough for her. He agrees to help a classically handsome but rather intellectually limited colleague in winning over Roxanne. C.D. creates poetry and witty conversation for the younger man to voice. Eventually, Roxanne learns who has been charming her, and amidst the dangers of a real fire, she and C.D profess their love.
Roxanne is, of course, the name of the heroine from Edmund Rostand's 1897 play "Cyrano de Bergerac". Rostand's large nosed, love-struck soldier is transformed into Martin's Fire Chief. A hilarious scene has Martin recounting 20 "big nose" insults in rapid succession to humiliate a would be heckler. That scene mirrors a similar set of verse from the play. Unlike other movies about fireman, the danger level is dialed way down in "Roxanne", as romance and laughs are center stage.