Which tire has the highest Treadwear (UTQG) in size 285/50R18

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 285/50R18?

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420 - Treadwear

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

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

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

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400 - Treadwear

 Pirelli Scorpion Zero - UTQG: 400AA - Tire Rating: 3.53

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320 - Treadwear

 Yokohama Advan ST - UTQG: 320AAA - Tire Rating: 4.55

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