Wilding
Just because it was obsure to the writers in 1981, doesn't make it any less an historical achievement. We know there were around 25-30 clay tournaments wins in that 4 year period - so the maths is pretty easy.
Sorry I should have wrote McEnroe was the 1st player to win 3 straight US Championships since Tilden. Much was made of this fact at the time, Mac was sort of speechless when it was mentioned.
Again, the thread topic was what Tennis Magazine in 1981 chose as the best achievements in tennis history. I find it hard to believe that Wilding's claycourt record was widely known then, that's more of a discovered record in the internet age (and even then, all you can come up with are estimates of his streak, not exact numbers, which we do have on Evert)
Just because it was obsure to the writers in 1981, doesn't make it any less an historical achievement. We know there were around 25-30 clay tournaments wins in that 4 year period - so the maths is pretty easy.