Importing? Every. Single. Object. One. By. One.
Run the script, select the objects you want to import. Click 'Import files'.
You can import mayaBinary(.mb), mayaAscii(.ma), obj files(.obj), fbx files(.fbx) and alembic caches(.abc) all at the same time. Furthermore you can filter you folder by file types.
Easy to use and does not require any type of installation, just run the script.
Tested in Maya 2017 and 2018.