Let's logically analyze one yet mentioned player's arsenal and resume...player A won slams on all surfaces, was #1 for, at the time, a record number of weeks and competed/won against greats from three distinct eras. Player A had a rubbish serve, finicky forehand and only adequate volleys/overhead. What he did have was a classic 2hbh that he used to punish his opponents in baseline rallies, ROS, net approaches and passing shots.
Player A is James Scott Connors and no one ever had such a devastating 2hbh weapon. The elegance of it was his supreme timing generated through graceful footwork...he never seemed hurried or out of balance when striking his backhand. Also, his ability to carve a bit of sidespin on high balls without going one-handed was totally unique.
Nobody beats Tomas Berdych 18 times in a row! Project 18 incomplete.