Which tire has the highest Treadwear (UTQG) in size 205/40R18

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 205/40R18?

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320 - Treadwear

 Nankang AS-1 - UTQG: 320AA - Tire Rating: 4.46

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300 - Treadwear

 Toyo Proxes 4 - UTQG: 300AAA - Tire Rating: 4.26

 Yokohama S.DRIVE - UTQG: 300AAA - Tire Rating: 4.33

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280 - Treadwear

 Bridgestone Potenza RE050A - UTQG: 280AAA - Tire Rating: 3.84

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