Love love love Propagandhi. I know it's not really what you were trying to do, but it's kind of unfair to compare them to Pennywise and The Offspring. Propagandhi are a lot more complex, don't try to write contrived anthems, and have actually shown progression since their debut, becoming more influenced by progressive rock and metal as time has passed. Every era of their work has some fantastic songs. These are my personal favourites:
Propagandhi - Supporting Caste - YouTube
Propagandhi - A Speculative Fiction LIVE in Leeds, UK. - YouTube
Propagandhi - Todays Empires, Tomorrows Ashes - YouTube