Just his presence in the court is very important for the Warriors team already because he can be a scorer, rebounder, passer and a great defender. Even him complaining against the refs or fighting against other players has an impact on the team.
If I'm not mistaken, he is the one the recruited KD as well isn't it?
Green will never be included in the Big 3 for nothing. Some might not see his value because when you say anything about the Warriors, it will always be Curry or Thompson but when you are a Warrior fan or a long time NBA fan you will know how Green is contributing to the team. He is also one of the reasons why the Warriors went to NBA Finals consecutive times.
Yeah, he will always be part of the big 3, Curry and Thompson might be their scoring machine, but Green was all around, rebound, bring the ball down, set up screens for Curry and Thompson, and then score. But most importantly, he is the heart and soul of the Warriors during their championship run. His leadership molded them to be one of the best team in the last 10 years.