There can be a lot of info in Special:ListUsers. Here's an excerpt from my test wiki:
Delete page script (talk | contribs | block) (Created on 8 January 2016 at 12:22) Maintenance script (talk | contribs | block) (Created on 8 January 2016 at 01:23) Mary (talk | contribs | block) (bot (until 19:23, 21 December 2016), bureaucrat) (Created on 25 July 2014 at 18:52) Password is q (talk | contribs | block) (administrator, bureaucrat, bot) (Created on 31 December 2013 at 11:47) (blocked) TTO (talk | contribs | block) (bureaucrat, administrator (until 11:00, 1 January 2035)) (Created on 14 September 2013 at 12:40)
That's with a draft patch for T12493, which includes user rights expiry information.
It should be converted to a mw-datatable:
| User | Member of groups | Created | Blocked? |
| Delete page script (talk ❘ contribs ❘ block) | 12:22, 8 January 2016 | ||
| Mary (talk ❘ contribs ❘ block) | bot (until 19:23, 21 December 2016), bureaucrat | 18:52, 25 July 2014 | blocked |
Extensions could add their own columns (e.g. globally locked).