In my home (/Users/) folder I have many files migrated from previous installations, with different Owners and Permissions set. /User shows I have three Users set in addition to Guest and Shared. I have used Finder to change permissions for all files to allow me as current User to read/write all. I would like to keep one other user, in addition to Guest and Shared, as admin only to allow access for repair etc.
How can I set myself as Owner of all files with full r/w (and x) access, so I can delete the then-un-needed Users, keeping Shared and Guest?