Most conductors follow the classic symphonic and operatic repertory, some focus on a specialty like choral music or orchestral pops. But Anthony Parnther is a kind of conducting Renaissance man, who has cut a wide swath across the musical landscape, from helming the San Bernadino Symphony Orchestra to working with vocal sensations like Rihanna, Common, and Jon Batiste to leading myriad film soundtracks. “Disney in the morning, Dvořák in the evening,” the busy conductor said breezily.