From best to worst how do you rank the strength of the following heavyweight decades?

Did one for the top 5-10 and another for the top 15-20 because depth changes everything. Put in tiers basically if its the same tier I had a hard time seperating them.



Top 5-10
T1 70s,30s
T2 90s,60s,20s
T3 10s,80s
T4 40s,2000s
T5 2010s
T6 50s


Top 15-20
T1 30s,70s,10s,40s
T2 80s
T3 2000s
T4 60s,20s,50s
T5 2010s
T5 90s

I think decades should be decided by debut year/birthday or 5 years because it makes comparing more even but I'm not doing that here. Who to count in what decade and careers being split in different decades makes this discussion a pain. So does one half of a decade being much better than the other. Its just bothersome comparing an era and whether someone did something in the year x9 or x0. Got in a few arguments about that its stupid and theres got to be a better way to sort fighters into generations.




The 2020s is ahead of the 2010s which I rated low. How high they are rated depends on the next few years because I was not a big fan of this whole Usyk/Fury/AJ/Wilder generation.