I think he did great rights and great wrongs. The most remarkable part of his legacy, is that he was far more fervently detested by his enemies in the Conservative Party than he was elsewhere. I may be the only pro European who posts to Mudcat, as I realise this policy is unpopular with both traditionally Labour and Conservative supporters. It is the commitment to Europe, for which I most admired the man. I believe he had integrity and strength.
In his economic policies, he was probably the most liberal Prime Minister we have had since I reached voting age. He once (rightly, I believe) referred to Blair on those issues,"He's to the right of me, of course."
On the down side, his calamitous misreading of the Northern Ireland situation goes against him, as he merely compounded the errors of his predecessors. In his later years, it was also galling to see him suck up to the butchers of Tiannemen Square. (Regrettably, Blair's performance was equally snivelling).
Probably what makes him stand out among the rest is that he was never a populist. It may have cost him popularity in a media age, but I liked him a little better for it.