Which tire has the highest Treadwear (UTQG) in size 245/60R18

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 245/60R18?

---

740 - Treadwear

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

---

680 - Treadwear

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

 Continental TerrainContact A/T - UTQG: 680AA - Tire Rating: 0

---

640 - Treadwear

 Nitto NT421Q Premier All-Season Crossover - UTQG: 640AA - Tire Rating: 0

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

---

620 - Treadwear

 Cooper CS5 Ultra Touring - UTQG: 620AA - Tire Rating: 0

---

600 - Treadwear

 Cooper Adventurer H/T CUV - UTQG: 600AB - Tire Rating: 0

 Yokohama Geolandar SUV G055 - UTQG: 600BA - Tire Rating: 0

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

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

---

520 - Treadwear

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

 Nexen Roadian HT - UTQG: 520AB - Tire Rating: 0

---

500 - Treadwear

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

 Kumho Solus KL21 - UTQG: 500AA - Tire Rating: 4.52

---

440 - Treadwear

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

---

420 - Treadwear

 Yokohama Parada Spec-X - UTQG: 420AA - Tire Rating: 4.55

---

400 - Treadwear

 Kumho Radial 798 - UTQG: 400AA - Tire Rating: 4.58

---

360 - Treadwear

 Falken Ziex ZE-912 - UTQG: 360AA - Tire Rating: 4.02

---