Janet definitely from your choices. Biellmann was helped enormously by the introduction of the factored placement judging system in 1981. Even the fact that she doubled her combination in the SP couldn't stop her. If they still had the total points system in use then we may have been looking at someone like Wegelius as world champ!!
I agree Ito was hurt by figures but also agree that even without them she would have won nothing major until '89. Perhaps Olympic bronze at best in '88 (which I agree would have been a travesty. She was clearly the very best there when you combine the SP & LP).