My personal fav punk band,
Anti-Flag
The song that got me into them, "Turncoat"
http://www.youtube.com/watch?v=Aa5KJ5C-QP8
Anti-consumerist/media propaganda song off their newest album "The End"
http://www.youtube.com/watch?v=adjNEcbzOOA
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Who can forget
Green Day and
Offspring? The first two CDs I ever purchased! (I bought cassette tapes before then)
The first song I ever heard by Green Day, "Basketcase"
http://www.youtube.com/watch?v=a73Y40Qqodo
I've always thought this track by Offspring was underrated, "All I Want"
http://www.youtube.com/watch?v=ZOUYl2XSwso
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I can't find any good quality videos, but
Propagandhi definitely goes up there as one of my favorite punk bands. They definitely have a lot of passion behind their music:
edit: A decent live video of them playing the first two songs I heard by them, "Natural Disasters" and "Back to The Motor Leagues"
http://www.youtube.com/watch?v=pdrcHP4sHA4
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Rise Against is a perfect example of modern punk music, and another of my favorites.
MMA Fans might enjoy the video of Hideo Tokoro highlights along with their single "Give It All" (the song starts 1min 20secs into it)
http://www.youtube.com/watch?v=hk1rS3xVu7M
Did I mention Rise Against is an all-vegan band that avidly opposes animal cruelty? This video has a few clips along those lines. The song is "Ready to Fall"
http://www.youtube.com/watch?v=pmoB2svMld8
It's also worth mentioning that all the members of Anti-Flag are either vegan or vegetarian as well.