Thatcher was a very divisive figure, and a statue of her would eventually befall the fate of those of Stalin in the ex-USSR. Teribus, if you want a figure from "our side" who did more, clearly Clem Attlee, in whose watch the NHS and the welfare state, the tpwering achievements of post WWII Britain, were created. Even Harold Wilson, who kept us out of the Vietnam war (from which his successors might have learned). Thatcher destroyed whole communities.