Instead of collating all your documents or files, let Finder manage the process for you with Smart Folders. These use search to gather files by the criteria you choose, such as name or file type.
Create a Smart Folder in Finder by clicking File > New Smart Folder.
You can type in a word or phrase to gather all files that have that term, and click the ‘+’ icon to add other criteria such as the dates that files were created.
The folder doesn’t actually house the files – you can still move, add and remove files from their original location and the Smart Folder will update accordingly.