Final answer:
Roger Sherman presented the plan at the Constitutional Convention that became known as the Great Compromise, suggesting a bicameral legislature with proportional representation in the House of Representatives and equal representation in the Senate.
Step-by-step explanation:
The individual who presented a new plan at the Constitutional Convention for representation, now known as the Great Compromise, was Roger Sherman.
Roger Sherman, along with Oliver Ellsworth, proposed a two-house national legislature. This compromise blended aspects of the Virginia Plan, which favored large states, and the New Jersey Plan, which favored smaller states. The Great Compromise outlined a bicameral legislature where the lower house, the House of Representatives, would have representation based on state population, and the upper house, the Senate, would have equal representation from all states with each state having two senators.