I think you might be giving too much credit to other teams.
When you look at numbers like fWAR and FIP, Gray is a top 30 or 60 pitcher, going back one year, 2 years or 3 years.
ERA- Gray was 77th in 2025 among all SP'ers with 100+ IP. That's like a #3, but when you go back 2 years, he's #63. Go back 3 years and he's #28, which can show he's been a #1. This is his "bad stat," and it still shows he's been a #2 over the past 3 years, but moving towards or into the #3 range as he ages.
FIP, he's #10 since 2023! He's #13 since 2024. He was #21 in 2025. All these support the idea that he's a #1, but I won't agree with that.
By fWAR, he was the #21 in 2025. How many teams have 2 guys above that?