It won't let me vote without voting for all 3. So my vote goes to @Makar. It was honestly a tough call. Mandy's is the quintessential jack-o'-lantern and it has a fantastic orange quality when it's lit up. But I felt there was a little more skill to Makar's candy skull pumpkin.
As for decorated or painted pumpkins, I vote nay. They're fine and all, but jack-o'-lanterns are specific to the holiday.