I have a copy of tinycommander since it came up in discussion here on the forum recently. I doubt it will become my goto fm, but it will bear some looking into from a scripting POV - nothing like snarfing good ideas from someone else's scripts (I absolutely love the argument parsing piece in /etc/init.d/tc-config !)
fm.awk looks interesting but, again more likely as a learning tool than a day-to-day file handling utility - I'm very much a noob with awk.
I've invested a goodly few brain cells in tweaking emelfm2 to my liking and certain of my tweaks don't seem to be possible (or at least not convenient) in any of the other file managers available in the repo. So I'll stick with it as long as I reasonably can, especially now that It is behaving a little better for me. fluff is my next favorite of the currently available fm candidates, followed, surprisingly enough, by the epsilon text editor.