I use plugs like that plugged into a couple different outlets on the outside of my house. The covers actually have a spot for an angled cord to come out.
I love these short extension cords aka power strip savers. You can adjust the angle:
Maximm Cable 6-Inch (0.5 Foot) 360° Rotating Flat Plug Extension Cord https://a.co/d/aUzAoaZ