Not all prime ministers are equal. Not remotely – which is why books taking one prime minister after the other can only ever tell a partial story. In this chapter, we consider the other seven (after Walpole and Pitt the Younger) who defined the office as ‘agenda changers’. They are the creators of the (still evolving) office of prime minister. All nine – two in the eighteenth century, three in the nineteenth, and four in the twentieth – carved out what the office of prime minister means, and shaped the office in their own image. After these ‘agenda changers’ ceased to be prime minister, their successors over the years that followed either tried to be like them, or tried deliberately to distance themselves from them: but none could escape their long shadow. They took advantage of wide-ranging historical or consensus change and moulded the office and country to their will.