What I have written here is to the best of my knowledge, but I am only a beginner at using the SE data explorer and corrections may be due. I did not write the queries mentioned but only slightly adjusted them. Others will certainly be able to improve them.
To some extent, votes are private. The public database mainly includes information that is somehow publicly accessible and excludes information that could compromise privacy. Close voters are listed under a closed post and permanently in the timeline. Reopen voters can also be seen in the timeline. Timeline information is in the data explorer, so it is possible to get a limited version of the information you want.
Close Voters
This query should return the top close voters.
Note that:
- It uses the PostHistory table record for close stats. The relevant schema stores the fact that the post was closed. Unsuccessful close votes are not accessible as far as I know, so this is only a count of those votes that resulted in the post being closed.
- Deleted posts are not included. This is a problem, because closing questions makes it much more likely that they will be deleted. But I do not think the PostsWithDeleted table has enough data to fix this because it has no user data.
Reopen Voters
This query should return the top reopen voters.
Note that:
- It uses the PostHistory table record for reopen stats. The relevant schema stores the fact that the post was reopened. Unsuccessful reopen votes are not accessible as far as I know, so this is only a count of those votes that resulted in the post being reopened.
- Deleted posts are not included.