And 'Paste and match Formatting' to Command V. In this example I reassigned 'Paste' to Option Command Shift V.
noting that the menu that you want to assign or reassign it's keyboard shortcut much match exactly what the menu says down to the capitalization. Enter the menu title that you want to change.
Now if you don't want to have to do that four finger salute just to paste (essentially) plain text, you can change the menu shortcuts in any application via the Keyboard Preference pane. In MS Office their version of 'Paste as plain text' is called 'Paste and Match Style and uses the macOS system defaults ( Option Command Shift V) for paste as plain text for that function.
