Best player to never win Wimbledon?
Lendl
Best player to never win the French Open?
Sampras
Best player to never win the US Open?
Borg
Best player to never win the Australian Open?
Borg
Best player to never win the season ending?
Nadal
Best player to never win the Davis Cup?
Federer
Best player to never win the career slam?
Sampras
Best player to never be number 1?
Murray
Pretty hard to argue with the above.
Lendl
Best player to never win the French Open?
Sampras
Best player to never win the US Open?
Borg
Best player to never win the Australian Open?
Borg
Best player to never win the season ending?
Nadal
Best player to never win the Davis Cup?
Federer
Best player to never win the career slam?
Sampras
Best player to never be number 1?
Murray
Pretty hard to argue with the above.