But 'GSP' came out top of the pile on this occasion thanks to MMASucka's scoring-based system.
The publication used stats and records from ESPN as it broke down the criteria behind its score system for the MMA GOAT list.
According to MMASucka, an overall win awards two points while a loss will result in a minus four-point deduction.
Meanwhile, fighters were awarded one point for each fighting year, three for each title won and two for each successful title defence.
The website awarded one point for each win in a fighter's longest win streak, while a failed drugs test resulted in a minus six-point deduction.
'GSP' and Johnson both finished on 92 points based on MMASucka's score system, but the two fighters were separated into '1A' and '1B.'
According to the publication, St-Pierre finished ahead of 'Mighty Mouse' because he "competed against more skilled competitors."
MMASucka's Eamon Lee explained: "As I mentioned, 'GSP' beat Hendricks, Diaz, Bisping, Hughes and Koscheck, while the best wins for 'Mighty Mouse' are against Cejudo, Benavidez (2X), John Dodson and Ray Borg.
"Therefore, 'GSP' and 'Mighty Mouse' are equally terrific fighters who were each dominant in their respected divisions, but 'GSP' at 170 faced more skilful opponents than Johnson ever did at 125."
Posted below are MMASucka's 11 best MMA legends of all time.
11. Henry Cejudo (46 points)
10. Conor McGregor (51 points)
9. Amanda Nunes (60 Points)
8. Daniel Cormier (63 points)
7. Jose Aldo (73 points)
6. Anderson Silva (82 points)
5. Fedor Emelianenko (86 points)
4. Jon Jones (88 points)
3. Khabib Nurmagomedov (89 points)
1B. Demetrious Johnson (92 Points)
1A. Georges St-Pierre (92 Points)
Featured Image Credit: PA
Topics: Khabib Nurmagomedov, Amanda Nunes, Conor Mcgregor, Jon Jones, Fedor Emelianenko, Anderson Silva, Daniel Cormier, UFC News, MMA News, Demetrious Johnson, Henry Cejudo, UFC, jose aldo, MMA, GSP, Georges St-Pierre
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