The list is, as seasoned posters mostly claimed, very biassed.
it is not Laverīs fault if Federer never wins the Gran Slam ( not even in the pathetic fields of Fedīs best year 2006 he was able to do it...)
And it's not Federer's fault Laver was banned from playing Grand Slams for the most of his prime. See, I can do it too.
And calling the 2006 field pathetic compared to Laver's year is a joke. Players now are way more athletic and professional than back then.