Get list of owners of a classic SharePoint site

[munrobasher]

I'm trying to write a script that lists the owners of all sites. I'm enumerating through all sites using this:

ForEach ($Site in Get-PnPTenantSite) {...}

For M365 groups, I've got the owners bit working:

If ($Site.Template -like 'GROUP*') {
        $Owners = (Get-PnPMicrosoft365GroupOwners -Identity ($Site.GroupId)  | Select -ExpandProperty Email) -Join "; "
}

However, I'm struggling with how to get the list of owners for a classic non-M365 site. I need to enumerate through the equivalent of this report from site permissions, i.e. look for each group/user with "Full control".

Although I've found that the "Site permissions" window doesn't give the full story and that the "Site access" window often has a different list of users. For example JE is shown her as owner in site access but doesn't appear anywhere in site permissions.

[argRegEater]

I'm also fighting with this situation (legacy/migrated sharepoint sites). Super curious to hear if anyone has ideas here.