Emerging from Subiaco, the actor honed his craft at a theater school before catching the attention of director Vittorio De Seta, who cast him in a pivotal role in “Almost a Man.” Capponi’s screen work balanced collaborations with celebrated auteurs-such as the Taviani brothers, Valerio Zurlini, Gérard Corbiau, Francesco Rosi and Nelo Risi-and appearances in genre productions, occasionally under th…