Every single national security advisor since Kissinger is, in fact, within two degrees of Kissinger:

General Brent Scowcroft: 1 degree- Kissingers national security advisor

Zbigniew Brzezinski: 1 degree- was on the faculty at Harvard with Kissinger, served with him on the President's Foreign Intelligence Advisory Board ( PFIAB)

Richard Allen: 1 degree- worked with Kissinger on the Nixon administration transition and then on Nixon's NSC staff

Judge William Clarke: 2 degrees- worked for former Kissinger aide Alexander Haig at the State Department

Robert McFarlane: 1 degree- worked with Kissinger on NSC

Admiral John Poindexter: 2 degrees- was McFarlane's deputy

Frank Carlucci: 1 degree- worked with Kissinger during the Nixon administration

General Colin Powell: 2 degrees- was Carlucci's deputy

Scowcroft again: 1 degree as above

Anthony Lake: 1 degree- was Kissinger aide

Samuel Berger: 2 degrees- was Lake's deputy

Condoleezza Rice: 2 degrees- was on Scowcroft's NSC staff

Stephen Hadley: 1 degree- worked with Kissinger on NSC

Source: Running the World by David J. Rothkopf