Hey, Dude, don't worry, I get
your spirit when compiling lists... you try hard to find criteria for it and it is wise enough to know the limited value, or better, the non-definitive aspect of it. And, yes, the comparison with guitar players is cruel, but, damn, I hate both kinds of lists and it is a good argument to me
.
Consensus, here? What have you been drinking? Whatever it is, I want some...
What I think it is achievable is a list of tiers: the top X (in no particular order), the next Y, etc and etc.
In that case I can even contribute, leaving completely clear that it is completely subjective. My first six would be:
1) Borg, Djokovic, Federer, Laver, Nadal and Sampras (alphabetical order, but people can debate that if they want).
Probably around 10 guys on the second tier, and surely more than that on the third. A special place for Guga just because we grew up on the same place.