On the gritty, star-studded Blank Face LP, ScHoolboy Q is at his very best. Through 17 tracks of heavy-lidded gangsta rap, the incisive L.A. native joins forces with guests both legendary (E-40, Jadakiss, Tha Dogg Pound) and soon-to-be (Vince Staples, Anderson. Paak). “Robbin’ your kids too,” he says on “Groovy Tony / Eddie Kane,” a haunting double feature. “My heart a igloo.”