Who were the four star generals in world war 2?

Joints Chief of Staff

Admiral Michael Mullen (USN)

General James E. Cartwright (USMC)

General George W. Casey, Jr. (USA)

Admiral Gary Roughead (USN)

General T. Michael Moseley (USAF)

General James T. Conway (USMC)

Also, anyone who are in charge of Major commands in each branch. For example, in the U.S. Air Force, the Air Education and Training Command (AETC) is headed by Gen. Stephen Lorenz. The Commandant of the Coast Guard is also a four star admiral.