No we're not, quite a few have given a high rating to Macmillan and not just Tories. (Typical Tory behaviour: lying and twisting the facts! *joke*)More realistically it would be a better sample of whom you think is bestest PM, if you gave your reasons why. At the moment the lefties are just voting for their own, and not giving an unbiased opinion, unlike the reasonable right.
So for me, you can only give a true opinion of a PM under whom you have lived and paid taxes too. Otherwise it's just a hearsay opinion from your parents or news written or otherwise of the time, or worse still from opinion makers writing with hindsight from people who were in nappies at the time.
So for me Maggie, 10. For curing a sick country and giving it back some self respect.