Combine or report on individual and household donations
hi and excuse the slight whinge but... providing links to things like the extension, makes it quicker for other busy folk (we all are) to help. And explaining 'why' you think it might not work also saves folk time looking stuff up.
AGGREGATE HOUSEHOLD CONTRIBUTIONS REPORT has its last release as 4.6. Best I can suggest is give it a spin and report back. That way if it works the maintainer of it may update the details
it can also be worth checking the git page and checking the Issues to see if anyone else is commenting about it working on more recent.
NOTE: if an extension says it is good for 4.7 then in theory it is good for 5.x
And Bingo! there is an issue about 4.7 compatability
and

so chances are good to very good. and if you report back on that issue (it is easy to do so) then every chance Allen (twomice) will take the hint and update.
Better still if you are keen (and welcome to this diy community) submit a PR on the info.xml and you will have made Allen's life at least one-click easier :-)