I don't think it is possible to get data about users on deleted posts, since the PostsWithDeleted table does not contain data about users. (Data shown in that table are indicated here: Database schema documentation for the public data dump and SEDE.)

hello Martin

What we should be able to get from SEDE is answers on closed questions which are not deleted.

SEDE: Answers on closed questions by a specific user

SEDE: Answers on closed questions by a specific user (with close reasons) (You can change the userid to view another user - I have added some user as an example.)

I have looked also at users who both answered and closed a question - also I am less confident about those queries since I have almost no experience with handling JSON in SQL.

SEDE: Users with most answers where they closed the question

SEDE: Questions both closed and answered by the given user

And I see that I somehow did not post here the very first query - which is the closest I can get to the question asked in SEDE:

SEDE: Users with most answers on closed questions

BTW if somebody asked me to guess who are going to be the top users in those queries, my quess would be wrong.

And since I see that I posted above a link to a specific revision rather than directly to the SEDE query, I will repost this one once again: Users with most answers where they closed the question.

I should probably wake up before coming here and posting things in chat. (Although I would probably make some mistakes anyway.)