How significant was Winston Churchill In the war against Nazi Germany?

AJP Taylor described Churchill as “the saviour of his country”.  Churchill's leadership for many including Taylor was the ultimate factor which lead to Britain’s ultimate victory in total war. However, his success has been a topic of debate, the Sydney Morning Herald in 1987 described Churchill contrastly as “ a drunk who cost Britain her Empire”. In order to deem if Churchill was indeed Britain’s saviour, we must observe his role in diplomatic efforts such as pulling together the national government after Chamberlain’s divided parliament failed as well has his international diplomatic efforts with Roosevelt and Stalin. The effects of Churchill as a man, his personality on his leadership must be observed to see if he was a leader who could lead the county to safety or to unnecessary casualties . Finally his military strategy must be analysed to see if his plans were influential in saving the country or if his involvement was not negligible in this factor.
Churchill was a lease of new life to war governance, he was not one of the guilty men that the public and the parliament seen as men who had placed the country at risk, he was intelligent with his appointments and politics, he created a true national government with Labour and Conservative in his war cabinet and making up important and vital cabinet positions. Churchill did not do much work on the home-front personally spending vast amounts of time abroad, leaving Attlee in charge but when he was abroad he was important in securing American and Russian support in a "Europe first" war which he supported until 1943 where his influence faded over his allies. On the other hand, Churchill’s military leadership seemingly did not directly help save the country, he if anything with misguided plans was a hindrance to defeating the Nazis quickly, until he appoints Brooke in 1942. His influence on the military is not helpful and neither is the home front but his appoint of Brooke for military, Attlee for the home front and Beven for labour lead to him having a lack of a direct presence on these areas, but his indirect effects were palpable and if he hadn’t appointed such capable people to these positions Britain could not have hoped to have been saved in the war. Addison sums up Churchill perfectly as “a great war leader but he was far from infallible”.