A lot of ppl will disagree, but a recent one that should be considered a classic is Radiosurgery by NFG. There's something about that album where I listen to it and think, this is how pop punk should sound.
I understand that it's wasn't the best album, not even their best work, but something about it was just right. Maybe it was the energy? Idk, but something about that album just think that that album personifies what I want to hear from artists and why I personally view it as a classic.