Cometh the hour, cometh the (wo)man.
This certainly applies to Churchill & to a lesser extent to Thatcher as well.
Both had their flaws: they both made statements & policy that with hindsight were wrong. But both utterly stamped their authority on their enemies - Churchill being against the Nazis while Maggie took on unions, the economy & the Soviets.
Without either of these two PMs the UK would be in a far worse position than it is today.