Force MacBook Pro on MacOS to Sleep
No, you can’t make it more aggressive.  

nfsd is the NFS server daemon and enabling it,  you’ve effective turned your Mac into a server.  Servers don’t go to sleep because you’ll “kill” services your network clients rely on.  Having this daemon prevent sleep is by design.

If its that important to have file sharing (NFS, SMB, iSCSI, etc.), get a NAS like a Synology Diskstation.  The “entry level” 2 disk models are affordable and extremely reliable.  This will allow you remove your Mac from doing double duty as your daily driver and as a workgroup file server.  It even has power saving settings that will allow it to spin down the drives and even go to sleep after a period of inactivity.