If such lists end up being about favorite players then choices will be because of playing style, personalities and so on.
The stats we have today about HOW players win started pretty much around 1991. We can compare Agassi, Sampras, Fed, Nadal and Novak with the same statistics.
Before 1991 for the most part we are just swapping opinions.
Weeks at #1 is not so good because of the way rankings used to be determined vs how they work today.
Total number of slams has to take into consideration the years that the AO was often skipped - and the fact that the FO was not always given the stature it is today.
It's so much easier to stick to an era and evaluate players who faced each other.
You simply can't think of anyone who eclipsed Connors at the beginning of his career. He was a brash young kid, making waves, then he was top dog. Borg was not so lucky, coming on the scene four later. Four years is a lot in tennis, almost as much as the 5 year gap between Fed and Nadal
Borg had a 3 year head-start on JMac. JMac had a tougher time, having to catch up to Borg and work his way through Connors' prime. But Lendl was REALLY hurt by having to develop as a player. Only a year younger than JMac, he was in the same position as Novak is right now. Connors was alone, at the top of the world, and in that position he had incredible self-confidence. JMac was more in Nadal's position, having to fight for dominance, but Lendl was denied slams by being born 1 year after JMac and and 5 after Connors. (There is about 1/2 year error there, since Connors was born in Sept.)
Lendl was never a favorite of mine, also true of Novak. But I believe BOTH these players deserve more respect than they usually get because when they were born, and who they went up against.
Finally, it's just silly to rate Novak's place in history right now, when he is still at the top of his game and may move up on the all time slam list. He won 8 slams in 8 years, and that 8th year has just started. It took Pete 13 years to get his last slam. It took Agassi 12 years to get 8.
So I rate Novak way higher than the rest of you, even though I am not excited about his playing style (so far). There are only 4 people with more than 10 slams in the Open era. Laver did not win 11 slams in the Open era.
I would say that Novak not at least getting to 10 slams by the end of his career is very unlikely.
If I have to make a post-Open list, Novak has to be 5th. I'm glad to tie other people with him, but I will not put him below 5.
And I'm not even a fan.