DENVER—The Denver Broncos are looking for a new head coach to lead them out of a six-year playoff drought and a half decade of losing seasons that marks the most protracted plunge by a Super Bowl champion in NFL history. The Broncos fired Vic Fangio after he went 19–30 over three years, including 7–10 this season despite having one of the easiest schedules and the highest-paid defense in the league. Had Fangio’s dogged determination, unpretentious personality, and first-rate professionalism led to better results on the field, he wouldn’t have been let go Sunday morning by team president/CEO Joe Ellis and first-year general manager George Paton. Paton sounded more like a man hiring Fangio than firing him when he declared, “He’s the best coach I’ve ever been around. And I don’t take that lightly. His attention to detail, his toughness, his work ethic, and his football mind is unparalleled.” “He put …