Might not be true, but watching his last performance against John Ryder it seems like he is going in the decline.
My list would be in no specific order.
Julio Cesar Chavez; 107-6-2 (85 KOs), world titles at 130-140.
Defeated: Mario Martinez, Ruben Castillo, Roger Mayweather X2, Rocky Lockridge, Juan Laporte, Edwin Rosario, Rafael Limon, Jose Luis Ramirez, Meldrick Taylor X2, Hector Camacho, Greg Haugen, and Frankie Randall X2.
Salvador Sanchez; 44-1-1 (32 KOs), world titles at 126.
Defeated: Danny Lopez X2, Ruben Castillo, Juan Laporte, Wilfredo Gomez and Azumah Nelson.
Ruben Olivares; 89-13-3 (79 KOs) world titles at 118-126.
Defeated: Jose Medel, Takao Sakurai, Lionel Rose, Chucho Castillo X2, Efren Torres, Bobby Chacon X2 and Jose Luis Ramirez.
Juan Manuel Marquez; 56-7-1 (40 KOs), world titles at 126-140.
Defeated: Manuel Medina, Orlando Salido, Marco Antonio Barrera, Joel Casamayor, Juan Diaz X2, Michael Katsidis and Manny Pacquiao.
Erik Morales; 52-9 (36 KOs), world titles at 122-140.
Defeated: Daniel Zaragoza, Junior Jones, Marco Antonio Barrera, Kevin Kelley, Paulie Ayala, and Manny Pacquiao.
Marco Antonio Barrera; 67-7 (44 KOs), world titles at 122-130.
Defeated: Kennedy McKinney, Naseem Hamed, Johnny Tapia, Kevin Kelley, Paulie Ayala and Erik Morales X2.
Gilberto Roman; 54-6-1 (35 KOs), world titles at 115.
Defeated: Paul Ferreri, Antonio Avelar, Jiro Watanabe, Kiyoshi Hatanaka, Sugar Baby Rojas X2, Juan Carazo and Santos Laciar.
Juan Francisco Estrada; 44-3 (28 KOs), world titles at 112-115.
Defeated: Brian Viloria, Giovani Segura, Carlos Cuadras X2, Srisaket Sor Rungvisai, and Roman Gonzalez X2.
Vicente Saldivar; 37-3 (26 KOs), world titles at 126.
Defeated: Ismael Laguna, Sugar Ramos, Jose Legra, Johnny Famechon and Howard Winstone X3.
Jose Luis Ramirez; 102-9, (82 KOs), world titles at 135.
Defeated: Edwin Rosario and Pernell Whitaker (controversial). He also had a controversial split decision loss to Alexis Arguello.
Ricardo Lopez; 51-0-1 (38 KOs), world titles at 105-108.
Defeated: Hideyuki Ohashi, Pretty Boy Lucas, Ala Villamor, Alex Sanchez, Will Grigsby and Rosendo Alvarez.
Carlos Zarate; 66-4 (63 KOs), world titles at 118.
Defeated: Rodolfo Martinez, Alfonso Zamora, Alberto Davila, and a very controversial loss to Lupe Pintor.
Alfonso Zamora: 33-5 (32 KOs), world titles at 118.
Defeated: Hong Soo-Hwan X2 and Eusebio Pedroza.
Miguel Canto; 61-9 (14 KOs), world titles at 112.
Defeated: Shoji Oguma X3, Betulio Gonzalez X2, Gabriel Abernal, Lupe Madera and Antonio Avelar.
Alberto Arizmendi; 93-27-17 (KOs), world titles at 126. (Competed from 118 up to 147)
Defeated: Battling Shaw, Freddie Miller, Chalky Wright X2, and Henry Armstrong X4s.
Humberto Gonzalez; 43-3 (30 KOs), world titles at 108.
Defeated: Lee-Yul-Woo, Chang-Ju-koo, Kim Kwang-Sun, Napa Kiatwanchai, Melchor Cob-Castro X2 and Michael Carbajal X2.
Jorge Arce; 64-8 (49 KOs), world titles at 108 up to 118.
Defeated: Thomas Rojas, Melchor Cob-Castro X2, Hussein Hussein X2, and Rosendo Alvarez.
Lupe Pintor; 56-14-2 (42 KOs), world titles at 118 up to 122.
Defeated: Johnny Owen, Alberto Davila, Jorge Lujan and Carlos Zarate.
Rafael Herrera; 47-9-4 (20 KOs), world titles at 118.
Defeated: Rodolfo Martinez X2, Venice Borkhorsor, Chucho Castillo and Ruben Olivares X2.
Pipino Isidro Cuevas; 35-15 (31 KOs), world titles at 147 (at age 18).
Defeated: Clyde Gray, Billy Backus, Pete Ranzany, and Angel Espada X3.
Carlos Palomino; 31-4-3 (19 KOs), world titles at 147.
Defeated: Everaldo Costa Azevedo, Dave Boy Green, Armando Muniz, and John H. Stracey.
He also had a close split decision loss to Wilfred Benitez.
Saul Alvarez; 59-2-2 (39 KOs), world titles at 154-175.
Defeated (Have to add context):
-Austin Trout
-Erislandy Lara (Very controversial)
-Miguel Cotto (Declining but was coming off consecutive wins, one of them being Sergio Martinez)
-Gennady Golovkin X2 (Second fight is controversial and in the trilogy he was shot)
-Daniel Jacobs (Rehydration clause)
-Sergey Kovalev (Rehydration clause and declining)
-Callum Smith
-Billy Joe Saunders
-Caleb Plant
My list would be in no specific order.
Julio Cesar Chavez; 107-6-2 (85 KOs), world titles at 130-140.
Defeated: Mario Martinez, Ruben Castillo, Roger Mayweather X2, Rocky Lockridge, Juan Laporte, Edwin Rosario, Rafael Limon, Jose Luis Ramirez, Meldrick Taylor X2, Hector Camacho, Greg Haugen, and Frankie Randall X2.
Salvador Sanchez; 44-1-1 (32 KOs), world titles at 126.
Defeated: Danny Lopez X2, Ruben Castillo, Juan Laporte, Wilfredo Gomez and Azumah Nelson.
Ruben Olivares; 89-13-3 (79 KOs) world titles at 118-126.
Defeated: Jose Medel, Takao Sakurai, Lionel Rose, Chucho Castillo X2, Efren Torres, Bobby Chacon X2 and Jose Luis Ramirez.
Juan Manuel Marquez; 56-7-1 (40 KOs), world titles at 126-140.
Defeated: Manuel Medina, Orlando Salido, Marco Antonio Barrera, Joel Casamayor, Juan Diaz X2, Michael Katsidis and Manny Pacquiao.
Erik Morales; 52-9 (36 KOs), world titles at 122-140.
Defeated: Daniel Zaragoza, Junior Jones, Marco Antonio Barrera, Kevin Kelley, Paulie Ayala, and Manny Pacquiao.
Marco Antonio Barrera; 67-7 (44 KOs), world titles at 122-130.
Defeated: Kennedy McKinney, Naseem Hamed, Johnny Tapia, Kevin Kelley, Paulie Ayala and Erik Morales X2.
Gilberto Roman; 54-6-1 (35 KOs), world titles at 115.
Defeated: Paul Ferreri, Antonio Avelar, Jiro Watanabe, Kiyoshi Hatanaka, Sugar Baby Rojas X2, Juan Carazo and Santos Laciar.
Juan Francisco Estrada; 44-3 (28 KOs), world titles at 112-115.
Defeated: Brian Viloria, Giovani Segura, Carlos Cuadras X2, Srisaket Sor Rungvisai, and Roman Gonzalez X2.
Vicente Saldivar; 37-3 (26 KOs), world titles at 126.
Defeated: Ismael Laguna, Sugar Ramos, Jose Legra, Johnny Famechon and Howard Winstone X3.
Jose Luis Ramirez; 102-9, (82 KOs), world titles at 135.
Defeated: Edwin Rosario and Pernell Whitaker (controversial). He also had a controversial split decision loss to Alexis Arguello.
Ricardo Lopez; 51-0-1 (38 KOs), world titles at 105-108.
Defeated: Hideyuki Ohashi, Pretty Boy Lucas, Ala Villamor, Alex Sanchez, Will Grigsby and Rosendo Alvarez.
Carlos Zarate; 66-4 (63 KOs), world titles at 118.
Defeated: Rodolfo Martinez, Alfonso Zamora, Alberto Davila, and a very controversial loss to Lupe Pintor.
Alfonso Zamora: 33-5 (32 KOs), world titles at 118.
Defeated: Hong Soo-Hwan X2 and Eusebio Pedroza.
Miguel Canto; 61-9 (14 KOs), world titles at 112.
Defeated: Shoji Oguma X3, Betulio Gonzalez X2, Gabriel Abernal, Lupe Madera and Antonio Avelar.
Alberto Arizmendi; 93-27-17 (KOs), world titles at 126. (Competed from 118 up to 147)
Defeated: Battling Shaw, Freddie Miller, Chalky Wright X2, and Henry Armstrong X4s.
Humberto Gonzalez; 43-3 (30 KOs), world titles at 108.
Defeated: Lee-Yul-Woo, Chang-Ju-koo, Kim Kwang-Sun, Napa Kiatwanchai, Melchor Cob-Castro X2 and Michael Carbajal X2.
Jorge Arce; 64-8 (49 KOs), world titles at 108 up to 118.
Defeated: Thomas Rojas, Melchor Cob-Castro X2, Hussein Hussein X2, and Rosendo Alvarez.
Lupe Pintor; 56-14-2 (42 KOs), world titles at 118 up to 122.
Defeated: Johnny Owen, Alberto Davila, Jorge Lujan and Carlos Zarate.
Rafael Herrera; 47-9-4 (20 KOs), world titles at 118.
Defeated: Rodolfo Martinez X2, Venice Borkhorsor, Chucho Castillo and Ruben Olivares X2.
Pipino Isidro Cuevas; 35-15 (31 KOs), world titles at 147 (at age 18).
Defeated: Clyde Gray, Billy Backus, Pete Ranzany, and Angel Espada X3.
Carlos Palomino; 31-4-3 (19 KOs), world titles at 147.
Defeated: Everaldo Costa Azevedo, Dave Boy Green, Armando Muniz, and John H. Stracey.
He also had a close split decision loss to Wilfred Benitez.
Saul Alvarez; 59-2-2 (39 KOs), world titles at 154-175.
Defeated (Have to add context):
-Austin Trout
-Erislandy Lara (Very controversial)
-Miguel Cotto (Declining but was coming off consecutive wins, one of them being Sergio Martinez)
-Gennady Golovkin X2 (Second fight is controversial and in the trilogy he was shot)
-Daniel Jacobs (Rehydration clause)
-Sergey Kovalev (Rehydration clause and declining)
-Callum Smith
-Billy Joe Saunders
-Caleb Plant
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