I'd like to put my hand up and suggest Magnet, too.

For ages, I used Amethyst, which is a "tiling window manager" for macOS, but somewhere along the way it got annoying to install/keep working properly due to some of Apples shenanigans.

So I moved to Magnet. I still use it daily, but honestly forget its there because I use it so much! Just feels like native macOS behaviour at this point.