First, doctrines of the Bible Students of Russell's time differ greatly from the Watchtower Society doctrines of Rutherford (and Fred Franz, etc.). So you cannot claim that Eisenhower ever held beliefs associated with the present-day Watchtower Society merely because he was "born into" a significantly different religion, which he abandoned long before he became president.
Second, going to West Point and fighting in the American army in two world wars marks him as an apostate, not a Witness.
Eisenhower was a Witness about as much as Nixon was a Quaker. (I'm surprised that Nixon didn't earn a spot on this list.)