List of 4 division lineal champions in the history of men's professional boxing:
1. Floyd Mayweather Jr.
2. Manny Pacquiao
3. Terence Crawford
List of 3 division undisputed champions in the WBA/WBC era:
1. Terence Crawford
List of 5 division world titlists in the history of men's boxing:
1. Tommy Hearns (only if you count WBO titles from before the WBO was widely recognized)
2. Sugar Ray Leonard (won his super middle and light heavy titles in the same fight at a catchweight)
3. Oscar De La Hoya
4. Floyd Mayweather Jr.
5. Manny Pacquiao
6. Terence Crawford
End of discussion.
1. Floyd Mayweather Jr.
2. Manny Pacquiao
3. Terence Crawford
List of 3 division undisputed champions in the WBA/WBC era:
1. Terence Crawford
List of 5 division world titlists in the history of men's boxing:
1. Tommy Hearns (only if you count WBO titles from before the WBO was widely recognized)
2. Sugar Ray Leonard (won his super middle and light heavy titles in the same fight at a catchweight)
3. Oscar De La Hoya
4. Floyd Mayweather Jr.
5. Manny Pacquiao
6. Terence Crawford
End of discussion.

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