Widgets Control by itthinx (Free)
This free plugin will allow us to choose which widgets on the footer or anywhere else will appear. You can be very detailed and make certain widgets appear on some pages and not on others. Super helpful. So ideally if you have a footer made up of widgets, remove the widgets from those specific pages and no more footer!
Conditional Menu by Themify (Free)
This free plugin allows you to organize where you’d like certain menu’s to appear. Creating a new menu that you’d like your landing pages to have, then allowing that menu to appear on those landing pages will do the trick.
So there you have it! Using these two plugins should solve the problem some might be having when removing both the footer, top header menu, or header altogether. Hope this helps.