I've seen several posts lately claiming such people as Mo Farah and Allyson Felix to be the "GOAT". I can't stop laughing at this joke.
The greatest runners of all time are
Male sprint- Usain Bolt
Male distance- Haile Geb
Female sprint- Shelly Ann Fraser Pryce
Female distance- Tirunesh Dibaba
The only possible challenge to any of those is Mesert Defar to Dibaba (Defar has a lead in head to head, but has never beaten Dibaba in the 10K, no one has)
There isn't any debate about this. Bekele is nowhere near Geb, Farah is not even in the same universe. (LMAO). No one is near Shelly or Bolt.