If you are cooking for two the air fryer toaster oven is a nice middle ground that replaces a toaster and a lot of sheet pan work without hogging space. For capacity versus footprint, aim for something that fits four slices or a small round pan while keeping the body shallow so you don't exceed your 15 inch depth with the plug. You can angle it slightly when stored and square it up when cooking if you need extra breathing room.
Even toast is mostly about rack position and preheating. Middle rack, one to two minutes of preheat, rotate once if the front browns faster. For ventilation, keep the crumb tray clean and use lined pans for fatty foods so drips don't hit hot elements. Air fry mode is the loudest, toast mode is quieter, both are fine for conversation. I tried that and it fixed everything but then... yeah.
