BFG KO2s have the three-peak mountain snowflake (3PMSF), and come in load rating appropriate for a Super-Duty.
But if you want a true winter tire, my family has been running Nokian tires for decades, and we love them. Any true winter tire will blow away an All-Season, All-Terrain, or Mud tire on snow and ice. The difference has to be experienced to be understood. We live at 8,500 feet and drive a lot of winding canyons, and winter is looong up here. Nokian is one of the most popular brands in the mountain towns of Colorado. They make both studded, and non-studded winter tires, but the only tire they make in 35-inches is the
Nokian Hakkapeliitta LT3: LT315/70R17 121/118Q (Studded or Non-Studded); max speed up to 100 mph, max load 3200 lb.
Nokian Home Page:
https://www.nokiantires.com/
I don't work for Nokian, just love their winter tires
Both the Goodyear Duratrac and the Cooper ST MAXX can be studded for improved traction on ice and hard-pack snow, but the rubber on these tires is not as sticky on snow/ice as is the rubber found in true winter tires (Nokian, Blizzak, etc.). Good luck!