In Denver Art Museum’s “Wild Things: The Art of Maurice Sendak,” one gets the sense of the author and illustrator as a whole person, from an oft-bedridden childhood gazing out his Brooklyn window to his global success and forays into stage and screen. That’s worth noting, since some exhibits promise a peek inside an artist’s brain, but just as often fail to provide a thoughtful push-back on the decades of myth-making that made them a household name. “Wild Things” resists tropes and plays with audience expectations while still offering the blockbuster imagery promised in the title.