Fought in the weightclass with arguably the second largest talentpool ever and his UFC-wins looked like this:
- Parisyan, at the time 10-2...............21 yo (GSP: 22 yo)
- Hieron, at the time 4-0.....................27 yo (GSP: 23 yo)
- Miller, at the time 11-3......................24 yo (GSP: 24 yo)
- Trigg, at the time 12-3.....................33 yo (GSP: 24 yo)
- Sherk, at the time 31-1-1.................32 yo (GSP: 24 yo)
- Penn, at the time 10-2-1..................27 yo (GSP: 25 yo)
- Hughes I, at the time 41-4...............33 yo (GSP: 25 yo)
- Koscheck I, at the time 9-1..............29 yo (GSP: 26 yo)
- Hughes II, at the time 42-5...............34 yo (GSP: 26 yo)
- Serra, at the time 10-4.....................34 yo (GSP: 26 yo)
- Fitch, at the time 19-2......................30 yo (GSP: 27 yo)
- Penn II, at the time 13-4-1................30 yo (GSP: 28 yo)
- Alves, at the time 17-5.....................25 yo (GSP: 28 yo)
- Hardy, at the time 23-6.....................28 yo (GSP: 29 yo)
- Koscheck II, at the time 15-4...........33 yo (GSP: 29 yo)
- Shields, at the time 26-4-1...............32 yo (GSP: 29 yo)
- Condit, at the time 28-5....................28 yo (GSP: 31 yo)
- Nick Diaz, at the time 26-7...............29 yo (GSP: 31 yo)
- Johny Hendricks, at the time 15-1...30 yo (GSP: 32 yo)
- Michael Bisping, at the time 30-7.....38 yo (GSP: 36 yo)
- The guys he has won against were on average 29.85 years old.
- When they've faced GSP, they had an average win-percentage of 85% - in comparison: the opponents Demetrious Johnson has won against had won on average 83% of their fights, Jon Jones' opponents' have won 81% of their fights, Jose Aldo's opponents have won 80% of their fights, Anderson Silva's opponents have won 79% of their fights and Emelianenko's opponents have on average won 72% of their fights when he beat them.
Another thing, which is important when looking at the level of opposition, is the number of wins and losses the beaten opponents of the above mentioned fighters had when they've beat them until the point where they've started losing repeatedly. Note: I have left draws out:
Mighty Mouse's UFC/WEC/One opponents:
312-
64 in
20 wins. (30-3 record himself)
Jose Aldo's UFC/WEC opponents:
317-
78 in
18 wins. (28-4 record himself)
Georges St-Pierre's UFC opponents:
392-
70 in
20 wins. (26-2 record himself)
Anderson Silva's UFC opponents:
298-
75 in
16 wins. (33-4 record himself)
Jon Jones' UFC opponents:
362-
83 in
20 wins. (26-1 record himself)
Fedor Emelianenko's opponents:
362-
139 in
31 wins. (31-1 record himself)
So if we base the strength of the opposition these guys have beaten on how high their win-percentage was when they've been beaten, the ranking looks like this:
- Georges St-Pierre (85%)
- Demetrious Johnson (83%)
- Jon Jones (81%)
- Jose Aldo (80%)
- Anderson Silva (79%)
- Fedor Emelianenko (72%)
Ranking the opponents of each fighter by their average experience (number of pro fights):
- Anderson Silva: 23 (23.3)
- Georges St-Pierre: 23 (23.1)
- Jon Jones: 22 (22.3)
- Jose Aldo: 22 (21.9)
- Demetrious Johnson: 19 (18.8)
- Fedor Emelianenko: 16 (16.2)
But at what point in their career did those fighters losses happen? At which age and at what level of experience? And against who?
Demetrious Johnson
1st loss: UD,
23 yo,
10 pro fights exp, B. Pickett's record then:
18-
4, now:
25-
14
2nd loss: UD,
25 yo,
15 pro fights exp, D. Cruz' record then:
18-
1, now:
22-
2
3rd loss: SD,
31 yo,
29 pro fights exp, H. Cejudo's record then:
12-
2, now:
15-
2
Jose Aldo
1st loss: Sub,
19 yo,
7 pro fights exp, L. Azevedo's record then:
6-
2, now:
17-
9
2nd loss: KO,
29 yo,
26 pro fights exp, C. McGregor's record then:
18-
2, now:
22-
4
3rd loss: TKO,
30 yo,
28 pro fights exp, M. Holloway's record then:
17-
3, now:
21-
5
4th loss: TKO,
31 yo,
29 pro fights exp, M. Holloway's record then:
18-
3, now:
21-
5
Georges St-Pierre
1st loss: Sub,
23 yo,
7 pro fights exp, M. Hughes' record then:
36-
4, now:
45-
9
2nd loss: TKO,
25 yo,
14 pro fights exp, M. Serra's record then:
9-
4, now:
11-
7
Anderson Silva
1st loss: UD,
25 yo,
2 pro fights exp, L. Azeredo's record then:
2-
1, now:
15-
10
2nd loss: Sub,
28 yo,
12 pro fights exp, D. Takase's record then:
4-
7, now:
12-
15
3rd loss: Sub,
29 yo,
16 pro fights exp, R. Chonan's record then:
7-
4, now:
22-
13
4th loss: DQ,
30 yo,
19 pro fights exp, Y. Okami's record then:
13-
2, now:
36-
14
Jon Jones
1st loss: DQ,
22 yo,
9 pro fights exp, M. Hamill's record then:
7-
2, now:
13-
8
Fedor Emelianenko
1st loss: TKO,
24 yo,
4 pro fights exp, T. Kosaka's record then:
19-
10, now:
27-
20
So far so good, but what possible taints the record of those fighters?
- Demetrious Johnson: n/a
- Jose Aldo: maybe that urine test? idk.
- Georges St-Pierre: allegedly had is cornerman rub vaseline on his back (https://www.bloodyelbow.com/2009/2/2/744379/more-on-the-georges-st-pie)
- Anderson Silva: has tested positive for banned substances multiple times
- Jon Jones: has tested positive for banned substances multiple times
- Fedor Emelianenko: n/a
Conclusion: you don't have to like Georges St-Pierre (or his fans) but his resume couldn't be further from overrated.
Side note for the Fedor fans: the fact that he's beaten lots of sub-par opponents between the all-time greats he has beaten does of course "taint" his record in the terms of the very statistics i've listed here, so i just want to say that he's in my top three best/greatest fighters of all time, consisting of him, St-Pierre and Mighty Mouse.