Okay, to me it's like that:
First EPs and singles combined into 1,039 Smoothed Out Slappy Hours plus Kerplunk phases, punk.
Dookie, pop punk.
Insomniac to Warning, lame pop punk.
From then on, that thing right there.
To me the punkest thing Green Day has ever done is this cover version for Husker Du's.
https://www.youtube.com/watch?v=yge4Rx_nPCk