How about using a PythonCaller and iterate over a listing of the archives content? The iteration can check if the path is pointing at a file or a directory and if it’s a file you can extract it to the location you want. 
 

I would wrap the whole thing in a custom transformer so you can specify the archive and the output directory.

This way you could even filter for specific file formats and control those with a dedicated user parameter of the custom transformer.