Laver or Borg did not win on hard court, So it pales in comparison to what Fed and for that matter, Sampras achieved.
Being 237 weeks at No.1 and being YE No 1 for 6 years, shows you have been at the top for most part of a decade and there is no one comparable to you.
So out of the achievements listed above, Fed and Sampras's are better.
Laver winning the grand slam is now equivalent to Nadal sweeping all clay court tournaments. The difference is Laver did it for just 2 years, Nadal's is like 8 and counting..
All these pre-open era folks need to take a pill and chill.