I would do a list, but I've been restricted... I'd say the fight with the highest combined greatness, that we can see, is probably Duran vs Leonard 1. My favourite between 2 ATGs (or borderline) is probably Morales vs Barrera 1
Duran vs Leonard or Greb vs Walker. Honorable mention to Canzoneri / McClarnin / Ross / Ambers / Armstrong and Harada vs Jofre.
https://www.boxingforum24.com/threads/top-20-greatest-wins-in-boxing.629006/#post-19826197 You can find my opinion here, as well as the opinions of some of the more prevalent posters
Hagler vs. Hearns as for the peaks they were in. The the fight materialized because both guys were at the top. Usually in a fight there is one fighter not peaking or not prime yet and we get a disappointment but in this fight it had to be great and it was.