Somehow it has but think about this:
McEnroe won both Wimbledon and USO, reached the final of RG once and didn't win AO, arguably, because he played it only twice during his prime.
Edberg: Won all but RG, where he reached the finals.
Lendl: Won all but Wimbledon, where he got to the finals twice.
Santana & Trabert: Never played AO, only one they didn't win
Nowadays the season structure (not only the homogenization of surfaces) makes more possible the ocurrence of the GS, Australian Open is played by all players not like before. Plus a player like Nadal who won his most difficult slam (USO and secondly AO) in his only chance -if he retired today- isn't that different from Lendl, Edberg or McEnroe who could have the honor if they'd won that elusive slam final