Here's a build I've been building for a few days. I used WorldEdit as well. It's a wooden PVP arena, although you can obviously do with it whatever you want.

If you want to use this build somewhere, please credit me!

Versions 1.14-1.15 are tested and work, but the world might not work properly on 1.13 and earlier.

Download includes a .zip file that contains a world folder and a schematic.