R. Nosson Tzvi Finkel, the Alter of Slabodka

In my biased and unscientific opinion, the man who proved to be the figure most (posthumously) influential in the post-war Yeshiva world was R. Nosson Tzvi Finkel, the famed Alter of Slabodka. His disciples created and influenced a large number of yeshivos, proving to be the moving forces behind many of the institutions that rebuilt the yeshiva world to its current glory after the devastation of the Holocaust.

An anonymous blogger has taken on the task of rekindling interest in this great figure: http://deralter.blogspot.com