Complex sentence: He appears throughout various novels as a volunteer fireman, an alcoholic, a philanthropist through the Rosewater Foundation, and among the few fans of the novels of Kilgore Trout (another of Vonnegut's creations).
Split into simpler sentences: He appears throughout various novels as a volunteer fireman, an alcoholic, and a philanthropist through the Rosewater Foundation. Among the few fans of the novels of Kilgore Trout (another of Vonnegut's creations).