orwell & klein were/are leftists, clearly.
fwiw, atwood has historically described herself as a 'red tory', which is a peculiarly canadian term that refers to somebody that is more or less a modern democrat. in canada, it refers to somebody that is kind of an old-timey tory, and opposes the neo-liberal tendencies in the contemporary conservative party, but that would position her several buses of school children to the left of somebody like joe biden.
it's also inexact. while the premise of red toryism has a concept of social liberalism underlying it, people that call themselves red tories today are oodles more socially liberal than any historical tory ever was.
so, she's far more moderate than the other two, but her point is no less cogent.