Probably the best ranked player whose attitude was most scrutinized. Bobby Jones played golf at a time where Americans still had not earned the golf elite's respect.
In 1921, Jones traveled over to St. Andrews, a course that Jones didn't early had a good relationship with. Jones was disqualified when on the 11th hole of the third round, he failed to complete the hole, ripping up the scorecard, but finishing the rest of the round and the fourth round. At that point Jones voiced his distaste for the course. The response from St. Andrews was rather unkind, them saying "Master Bobby is just a boy, and an ordinary boy at that."
However, Jones came around to the course, even requesting that the trophy from his 1927 Open Championship be left at the club. As well, his sportsmanship was a proven entity. In the 1925 US Open playoff, Jones called himself on a penalty for moving the ball, when nobody else saw it move. Jones refused to give on the ruling, and lost the tournament by one stroke (the penalty cost him two).
Jones' greatest feat came in 1930, when he won the Grand Slam. His greatest shock was his retirement from golf. Bobby Jones had a very harsh personality, but his pure intentions shined through in most circumstances.