Ranger file browser. It's fast af, can have multiple tabs, and can be hot keyed. You can also write extensions.

I have hot keys to run scripts that open files in nvim servers on any workspace for example E1 sends the file to a buffer on workspace one. I can also do the same thing for any other file using O1 etc which uses xdg-mime.

I have a python extension I wrote that ssh's into my file server, greps files, returns the results in fzf, and then changes directory to the file associated with the grep result selected in fzf. So if I need to find a contract provision or an old client file, it takes seconds.