‘Which is the best controller for Fortnite?’
If you're playing on PC I suggest using and learning a Xbox controller as it'll provide less of a learning curve and it's not that hard to connect and set up. If you're wanting to use a PS4 controller (unsure if PS5 is supported/has supported software yet) you can try DS4Windows. It can be a little painful to set up and learn but if that's what you're used to playing on then I'd give it a shot. These are the only two newer controllers I've used and recommend so if you have those available demo each and use whatever works best.