Which presidents were zero factor?

The Zero Factor was a supposed "curse" by Native American chief Tecumseh. The presidents that are part of this speculation are William Henry Harrison, Abraham Lincoln, James A. Garfield, William McKinley, Warren G. Harding, Franklin D. Roosevelt, John F. Kennedy. The speculation was that all presidents elected in years ending in zero would die in office. Ronald Reagan was elected in 1980 and George W. Bush was elected in 2000. Neither died in office.