After WWII was won he was able to increase Britain's economy. He introduced reforms such as the Mines and Quarries Act of 1954, which improved working conditions in mines, and the Housing Repairs and Rent Act of 1955, which established standards for housing. He brought inflation down from almost 2500 % to about 1800% (post war). He also brought down the national debt from almost 250% to below 150%
He increased the economic growth from 0% to 4% (stats from economicshelp.org)
Churchill could also be called a villain because he had horrible views about other people, and strongly abused