Are any of those official mirrors?

Wikipedia points to https://sci-hub.ru as the official URL, and that site lists all official mirrors as [1]:

sci-hub.se

sci-hub.st

sci-hub.ru

All of which are different from your list. I have no idea personally, I'm just wondering how to know what to use.

[1] https://sci-hub.ru/mirrors

Any of them.

.se was the official, post-seizure Elbakyan suggests .ru.

Also https://sci-hub.ru as maintained and linked by Alexandra Elbakyan, Sci-Hub founder.

Is there an onion address too?

Any tor addresses?

There used to be one at http://scihub22266oqcxt.onion/ but that short address form is now obsolete.