Which tire has the highest Treadwear (UTQG) in size 255/65R16

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 255/65R16?

---

740 - Treadwear

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

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

---

680 - Treadwear

 Continental ContiCrossContact LX - UTQG: 680AB - Tire Rating: 4.17

---

640 - Treadwear

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

---

600 - Treadwear

 Cooper Discoverer LSX Plus - UTQG: 600AB - Tire Rating: 0

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

---

520 - Treadwear

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

---

500 - Treadwear

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

 Hankook Dynapro HP RA23 - UTQG: 500AA - Tire Rating: 4.17

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

 Nexen Roadian AT - UTQG: 500AB - Tire Rating: 4.5

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

---

440 - Treadwear

 Michelin Latitude Tour HP - UTQG: 440AA - Tire Rating: 4.3

 Hankook RA07 - UTQG: 440AB - Tire Rating: 4.63

---

420 - Treadwear

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

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

 Kumho Road Venture ST KL11 - UTQG: 420AB - Tire Rating: 4.56

---