My vote is Junxia Wang for the greatest woman 10000m runner of all time, by far. She was potentially the greatest 10000m runner including men, but did not have the range of honors won to be in that category, also women have not had the same opportunity as the men. In any case, Wang has held the 10000m record for 17 years and is still more than 20 seconds faster than the 2nd fastest time. Amazing! I feel she was the most talented distance runner ever, women or men.
I feel with competition at her best Junxia Wang was capable of sub 28:50 and sub 14 minutes for the 10k and 5k, also capable of sub 2:15 for the marathon. Let's remember she won the world championships marathon in a runaway victory, passing men who were running 2:15 pace in the last part of the race.
I also feel Junxia Wang would have beaten Dibaba at least 9 times out of 10.
For men, based on times, Bekele, Gebrselassie, Tergat in that order. The list would be different if based on victories not times, however I personally feel that times are more important than victories.
The comments about some of Ma's runners being banned for drug use in 2000, runners who were not as fast as the runners in 1993 who passed all tests, even though the 2000 runners did the same or even better training, is more proof to me that any drug use results in a DECREASE in performance.
This only makes sense, as all medications are poisons that are hard on the liver, kidneys, spleen, heart, digestive system and other organs of the body. Any perceived improvement would only be in the mind, not the body, thus always undesirable.
Also if drugs were the answer then why have no other runners bettered those times as there have been many runners on drugs, especially Americans. So the drug argument is simply a jealousy, either sexist, racist, or some other kind of prejudice, but not truth in reality.