What general replaced MacArthur?

MacArthur was not in the United States from 1935, when he went to the Philippines, until fired by Truman in 1951, except for one wartime visit to Hawaii to meet with President Roosevelt. Hawaii was at that time a US Territory, not a state.

MacArthur was SCAP - Supreme Commander Allied Powers, in Tokyo, from 1945 until he was fired in 1951. Korea fell under his supervision, and his command there included the US 8th Army and the X Corps, but MacArthur was most of the time in Tokyo.

He was succeeded as SCAP by Matthew Ridgeway.