There may be a macro program out there that can do that but I am unaware of any specific ones with that functionality.
To really get paste plain text in an MS Office application you would likely need something that could capture a regular paste command and then select the plain text icon from the formatting menu that pops up at the insertion point after you paste. Here are the steps for the right-click & drag method to paste values: Select the range you wan to copy. NOTE that this is not really "paste plain text" but will give you at least some of that functionality with very little pain. Alernatively you can use Alt > E > S > E. Simply add Alt for Paste Special and use E for Transpos e. Remember This Shortcut: Ctrl + V is the usual command to Paste. I didn't do this for all applications as I don't want to chance messing up the behavior of other applications that you can copy/paste with. This Excel Shortcut pastes and transposes. And "Paste and Match Formatting" to Command V. Keep pressing the right mouse button, and drag the cells back to their original location. Press the right mouse button, and drag the cells slightly to the right. In this example I reassigned "Paste" to Option Command Shift V. An even quicker way to paste values is by using a mouse shortcut: Point to the border of the selected range, and the pointer should change to a four-headed arrow. Repeat for any other keyboard shortcuts you want to add/change in any other applications you want to change them for.Click in the Keyboard Shortcut field and tap the keyboard shortcut you want to assign to that menu option, then click Add.noting that the menu that you want to assign or reassign its keyboard shortcut must match exactly what the menu says down to the capitalization. Enter the menu title that you want to change.Click the + button and from the Application menu select (for example) Microsoft Word.Click on System Preferences > Keyboard > Shortcuts > App Shortcuts.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.