As Unity points out, it's a faintly pointless exercise of Newsnight's to ask us to vote for our favourite post-war Prime Minister, which will inevitably be rigged one way or the other, by Labour or the Tories.
That's why the sensible option must be to vote for Ted Heath. Why? Because (1) He's a Tory, which will piss off Labour, and (2) He's not Thatcher, which will piss off the Tories.
The Newsnight poll is here. Go go go!