I feel like a lot of the TDE stuff has a distinctive west coast vibe, especially their in-house producers. Mustard is great but I feel like he takes a lot of trap influence so I can't really say his stuff screams out "west coast" to me.
Game has a lot of west coast style beats, but I don't know whether I say this because the beats are truly west coast or because Game feels the need to shout out Dre or Snoop or how the west coast is better than anywhere else every couple bars.