For most of the time, I use KDE's own KIO slaves but, sometimes for long running stuff I want something more advanced. TBH, my remote servers list is taking a lot of space on the left pane. :D
Will take a look to Krusader, didn't check it for a very long time.
Edit: Just checked, it looks a lot like PathFinder (for macOS). Will try it, thanks again.
Also there's Krusader (KDE/Qt - https://krusader.org/ ) if you want something with two panes.