Based on our analysis, we recommend:

Stick to the big names (FitGirl, DODI). The risk of a "gnarly" or "sketchy" repack containing a rootkit or Trojan that steals your browser passwords is not worth saving a few gigabytes of download size.

Gnarly Repacks have become attractive to many due to their:

Never trust your local antivirus (Windows Defender) alone.

Here is a guide on how to determine if the specific "Gnarly Repacks" you are looking at are safe, and how to handle repacks in general.