John Kennedy, Lyndon Johnson, Richard Nixon, Jimmy Carter, George H.W. Bush
Extra Bonus Points - Both Theodore and Franklin Roosevelt served as Assistant Secretary of the Navy.
All without peeking. Honest.
Ok, I missed Gerald Ford.
(Never really considered him a President. Just a Congressman from Grand Rapids who kept the chair warm for a couple years.)
Sure. :-) Can you tell me the years they all served?
No, other than they were WWII vets. Except for Carter who didn't graduate from Annapolis until the war was over. He was a bubblehead with a bright future in nukes before leaving the service to go home and take over the family peanut farm.