AW used similar criteria a few years back in ranking athletes in all time lists.
Based on my previous post about there being only 4 criteria that can be used for comparison, It went something like this: -
Olympics: - 20 points for G, 10 for S, 5 for B.
Plus a bonus 5 points for breaking a WR in an Olympic final.
WR: - 20 points for breaking the WR, then 10 points for a 2 time & 5 for a 3rd.
Then a point is awarded for every completed year an athlete holds the WR for.
World Rankings : - based on the T&FN rankings, one gets 10 points for a No. 1, 9 for No.2, down to 1 point for a No 10 ranking.
Longevity : - 1point for every season ranked in the top 10.
I took the top 6 candidates since WW2 and applied the above points system.
Snell - 117
Juantorena - 89
Coe - 156
Cruz - 70
Kipketer - 157
Rudisha - 115 (N.B. not including the rankings for the 2014 season, as I don't think they've been revealed by T&FN yet. But I would think he'll probably be ranked 3rd and therefore get 8 points plus 1 for another season in the top 10. This will bring him to 124).
It's too late for me to break the points for each category now, but may find time tomorrow.
N.B. for WR's I gave Kipketer 20 points for his 1:41.24 and 10 for his 1:41.11. For his 1:41.73, which equalled Coe's existing mark, I gave another 5.
So based on this criteria which can be fairly and equally applied to athletes from any era ( except the 2 WWars) the list is as follows:
1. Kipketer - 157
2. Coe - 156
3. Rudisha - 124
4. Snell - 117
5. Juantorena - 89
6. Cruz - 70
Having said that, this wouldn't be the same as my own personal list.