Which tire has the highest Treadwear (UTQG) in size 275/70R16

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 275/70R16?

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640 - Treadwear

 Toyo Open Country H/T - UTQG: 640AB - Tire Rating: 4.69

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600 - Treadwear

 Kumho Road Venture APT KL51 - UTQG: 600AA - Tire Rating: 4.25

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520 - Treadwear

 Achilles Desert Hawk H/T - UTQG: 520AB - Tire Rating: 4.47

 Pirelli Scorpion STR - UTQG: 520AB - Tire Rating: 3.57

 Nexen Roadian HT SUV - UTQG: 520AB - Tire Rating: 4.79

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500 - Treadwear

 Toyo Open Country A/T - UTQG: 500AB - Tire Rating: 4.52

 Yokohama Geolandar A/T-S G012 - UTQG: 500AB - Tire Rating: 4.52

 Yokohama Geolandar H/T-S G051 - UTQG: 500AB - Tire Rating: 4.3

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460 - Treadwear

 Dunlop Grandtrek AT3 - UTQG: 460AB - Tire Rating: 4.35

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440 - Treadwear

 Pirelli Scorpion ATR - UTQG: 440AB - Tire Rating: 4.04

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420 - Treadwear

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

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

 Toyo Proxes ST 2 - UTQG: 420AA - Tire Rating: 4.43

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

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400 - Treadwear

 GT Radial Adventuro A/T - UTQG: 400AB - Tire Rating: 4.38

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