The situation in which the magnitude of the total force is greater than the magnitude of each of the individual forces is:
Two people stand on the same side of a large box. One pushes, and the other pulls with the same amount of force.
In this scenario, the forces are acting in the same direction (the push and the pull), resulting in a greater total force than each individual force. In contrast, when forces act in opposite directions (such as in the other scenarios given), the total force will be the difference of the magnitudes of the individual forces, which can be equal to or less than the individual forces depending on their directions and magnitudes.