What plan proposed a multiple executive office and 1 house legislator?

The plan you are referring to is likely the New Jersey Plan, proposed during the Constitutional Convention of 1787. This plan advocated for a unicameral legislature with equal representation for each state, alongside a multi-person executive branch. It was designed to maintain the sovereignty of the states while providing a framework for a stronger federal government compared to the Articles of Confederation. Ultimately, the New Jersey Plan was overshadowed by the Virginia Plan, which proposed a bicameral legislature based on population.