Which tire has the highest Treadwear (UTQG) in size 295/50R15

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 295/50R15?

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440 - Treadwear

 Cooper Cobra Radial G/T - UTQG: 440AB - Tire Rating: 4.43

 Dunlop SP Sport GT - UTQG: 440AA - Tire Rating: 4.25

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420 - Treadwear

 Toyo Proxes ST - UTQG: 420AA - Tire Rating: 4.58

 Hankook Ventus ST RH06 - UTQG: 420AA - Tire Rating: 4.75

 Kumho Ecsta STX KL12 - UTQG: 420AA - Tire Rating: 4.5

 Marshal Matrac STX KL12 - UTQG: 420AA - Tire Rating: 4.66

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