The most fair and effective counterclaim from the provided options is:
"Everyone knows that each voter should have only one vote, and the Electoral College makes it possible for some people’s votes to count as more or less than one."
This counterclaim effectively addresses the principle of equal representation in a democracy. It highlights the issue that the Electoral College system does not treat every vote equally, which is a significant concern regarding fairness in elections. It emphasizes the fundamental democratic value that each person's vote should have the same weight, making it a strong and relevant challenge to the argument in favor of the Electoral College.