Retrospective approval ratings of British PMs

[Phony Moderate]

Churchill - Disapprove (Police statism, terrible economic management, social collectivism)
Attlee - Approve (Wound down the Empire, oversaw the creation of the NHS, nationalization)
Eden - Disapprove (Suez Crisis)
Macmillan - Approve (Oversaw a good economy, decolonisation)
Douglas-Home - Neutral (Wasn't in office long enough to judge him)
Wilson - Approve (Oversaw radical social reforms (the legalization of homosexuality, liberalization of abortion and divorce laws, reduction of censorship, abolition of capital punishment, increased immigration, etc. Oh, and England won the World Cup )
Heath - Slightly Disapprove (Took us into the EEC, but was pretty bad on the domestic front)
Callaghan - Approve (Similar to Jimmy Carter in the sense that he constantly (and unfairly) gets bashed by the Right, while they treat his successor as a God (or Goddess). He was also a colleague of my grandad in the 1930's)
Thatcher - Disapprove (Obviously)
Major - Slightly Disapprove (His government was more moderate (in several aspects) than it was often made out to be.)
Blair - Slightly Approve (Increased spending on public services and needed social reforms. I would call one of our greatest Prime Ministers if it hadn't been for Iraq and an expansion of the police state.)
Brown - Slightly Approve (Handled the financial crisis better than he is given credit for.)
Cameron - Disapprove (Fake libertarianism.)

[Silent Hunter]

I more or less agree with you, with one giant exception, which most Brits share: Churchill.

While his 1951-55 term may not have been much to write him about, his vital role from 1940 to 1945 makes him an excellent PM in his own right; one of the greatest in fact.