Here is a list of the best fight that could happen in each weight class from welterweight to heavyweight. Not even one has happened, nor will it probably ever. Heavyweight: Wlad vs Fury (Wlad prefers to fight cab driver Alex Leapai, who has done nothing of note in boxing, rather than fight Fury for a huge payday) Cruiserweight: Yoan Pablo Hernandez vs Marco Huck (their common trainer said the fight will never happen) Light heavyweight: Stevenson vs Kovalev (Adonis wants no part of Kovalev) Super middleweight: Froch vs Groves 2 (Froch refuses to fight Groves again) Middleweight: Golovkin vs Martinez or Quillin (the top middleweights are all ducking GGG) Light middleweight: Saul Alvarez vs Erislandy Lara (Alvarez has been ducking Lara for years now) Welterweight: Mayweather vs Pacquiao (it's clear the promotors do not want this to happen) Now, at the lower weight classes, the best fights do happen: Light welterweight: Here the best fight actually happened (Garcia vs Matthysse). Lower divisions: Here the best fights also have happened, like Rigondeaux vs Donaire, Mikey Garcia vs Salido and JuanMa, and many others.
Wlad v Wilder. Hernandez v Huck Stevenson v Kovalev Froch v Groves 2 Martinez v GGG Alvarez v Cotto Mayweather v PAC Garcia v Provodnikov Vasquez v Burns Garcia v Gamboa Salido v Lamanchenko Quigg v Frampton
Garcia-Provodnikov is a good fight, but Erislandy Lara would be a tougher fight for Alvarez than a fading Cotto.
105: Takayama vs. Budler 108: R. Gonzalez vs. Ioka 112: Yaegashi vs. Segura 115: Srisaket vs. Tepparith 118: Moreno vs. Yamanaka 122: Rigondeaux vs. Santa Cruz 126: Jhonny vs. Salido 130: Mendez vs. Miura 135: Burns vs. DeMarco
Fury - Perez YPH - Huck Kovalev - Stevenson Froch - Groves 2 Ggg - Martinez Lara - Alvarez Mayweather - Pac Matthysse - Provodnikov Lw is v poor actually. Maybe Burns Crawford will be decent Gamboa - M Garcia Donaire - Mares Frampton - Santa Cruz