Who is considered the greatest rock drummer?

John Bonham is considered the most influential drummers in rock. Bonham was ranked no. 1 on Classic Rock's 2005 list of 50 Greatest Drummers in Rock

John Henry Bonham (31 May 1948 – 25 September 1980) was an English musician, best known as the drummer for the rock band Led Zeppelin. Esteemed for his speed, power, fast single-footed kick drumming, distinctive sound, and feel for groove, he is regarded as one of the greatest and most influential drummers in music history.