1 - Zoro temporarily blocked Hakai, the combination attack from two Yonko, and saved all the SN. A feat nobody else could achieve.
2 - wrong, Law stated Zoro tanked hakai not that he saved him.
3 - Zoro scared 2 Yonko with an unusual sword, as in cursed sword, that used Zoro's haki.
4 - Zoro bested and scarred Kaido. That's so-called paper cut still caused Kaido more damage than any other single attack.
All of the SN achieved less and attacks amounted to nothing. Even Lufdy acknowledged that his attacks are too shallow to do anything.
See above.