As I have promised, following Paul Linford's list:
Brought forward a radical agenda which included the formation of the NHS.
Did not bring us into Vietnam, in spite of pressure from the Johnson administration, founded the Open University, kept things together during the EEC Referendum, and managed to keep the country together after devaluation, although he should have devalued just after the 1966 election.
A stout believer in Kensyan orthodoxy (when it worked) and a firm European and Atlanticist
Didn't panic once during the IMF crisis and sided with Denis Healey, as opposed to Tony Crossland.
Low unemployment, national minimum wage, New Deal. Labour since 1997 has presided over them all, although it's best for a proper assesment on Blair after he has left office.
Sir Alec Douglas Home
Nice guy, perhaps the nicest in No 10, but he was only there for 363 days. Scrapped Retail Price Maintenance.
I am no Federalist, but I agree with Britian joining the EEC and Heath should be congratulated on that. He also realised, albeit too late, the damage an unfettered free market can do, although he brought no real alternatives from the centre, which was what was needed.
Perhaps he would have been a far better PM in a different time, but he tried to marry Thatcherism with corporate interventionism, as well as not reacting swiftly over Black Wednesday and for that he suffered
Aside from her dictatorial manner and regarding three million unemployed as a price worth paying, she did redeem her incompetence over the Falklands invasion (although the sinking of the Belgrano was perhaps unessesary) and stood up to the likes of Scargill, although more should have been done to help the coal industry
Sir Winston Churchill
A good consensious PM, but in ill health and past his best. If 1940-1945 counts I would put him at No 1.