The collaborative, almost communal problem-solving feels very King. In novels like 'The Stand' or 'Under the Dome', disparate groups of survivors have to pool their knowledge and skills. 'Stranger Things' does this every season, bringing together the kids, the teens, and the adults, each with their own piece of the puzzle. Joyce knows Will's patterns, Hopper has police access and grit, Dustin understands the science, Eleven has the power.
No single hero can save the day; it requires the entire, makeshift family they've built. This emphasis on collective action and found family overcoming a fragmented society is a hopeful thread in much of King's work, and it's the emotional core that makes the horror in 'Stranger Things' bearable and ultimately triumphant.