Which tire has the highest Treadwear (UTQG) in size 265/65R18

It's time to buy new tires for my car, but I want to buy a tire that lasts longer than the original brand, OEM. Which tire has the highest Treadwear in this size 265/65R18?

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740 - Treadwear

 Cooper Discoverer SRX - UTQG: 740AB - Tire Rating: 0

 Continental CrossContact LX20 - UTQG: 740AB - Tire Rating: 0

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680 - Treadwear

 Continental TerrainContact A/T - UTQG: 680AA - Tire Rating: 0

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640 - Treadwear

 Nitto NT421Q Premier All-Season Crossover - UTQG: 640AA - Tire Rating: 0

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600 - Treadwear

 Nitto Terra Grappler G2 All-Terrain Light Truck Radial Tire - UTQG: 600AB - Tire Rating: 0

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580 - Treadwear

 Goodyear Wrangler TrailRunner AT - UTQG: 580AB - Tire Rating: 0

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480 - Treadwear

 Michelin Energy Saver A/S - UTQG: 480AB - Tire Rating: 0

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