I listen to a lot of ska/punk, so not punk thoroughly:
Westernbound Train
The Toasters
The Mighty Mighty Bosstones
Goldfinger
Five Iron Frenzy
These bands are like Dropkick Murpheys:
Flogging Molly
The Tossers
The Real Mackenzies
Classic Punk (or at least my opinion):
The Offspring
The Ramones (duh)
Sum 41
blink-182
Sublime
Motorhead?
Rage against the Machine
Agent Orange
Misfits
nofx
Bad Religion
Black Flag
Anti-Flag
The Clash
Zebrahead
Wolfmother
While I love Wolfmother, I don't believe it can be considered punk. I could be persuaded though.
It's not hard to find punk, find one band and click related. Although, the ones I put above kick ass and can save you time searching.