Well, 7-zip, subject of this thread, does it (that one is useful though). Git adds "Git bash here" and "Git GUI here", which I never use. VLC adds 2 items, which I never use. There's useless for me stuff from Windows itself.
There are some strange builtin entries from Windows. Like why do I have the option to "play" a jpeg on any Bluetooth headsets that are paired with my laptop? I just found out that besides "open with" and "send to" there is a third way to open a file using "share" to share a file with an app.
The most useless entry is probably from AMD Radeon software. Two entries on the very top of the context menu on every folder. I would understand if it appeared in the menu of the Desktop folder, but not on every single folder no matter how deep in the file structure.