I used GBoard for awhile - Google's 3rd party keyboard. It isn't BAD but you can tell it has a TINY bit of lag that the stock one doesn't have. Still, the ability to search google from the keyboard is pretty cool (googling gifs to put in chats is super easy). I found the accuracy to be a little better than the stock keyboard too. Wallpapers and color theming are pretty sweet. However, that tiny bit of lag, especially on startup just kills it for me. So I'm back to stock.