FYI, they are being sold as "Hugh's log suckers" but it took me a bit of googling to identify what they were and subsequently their profile on SF.
My shortlist/thinking is currently down to either:
* sparkling gourami [for their different activity];
* microdevario kubotai (when the current LFS stock is replenished; current remaining stock are not as good as previous batches) [for their combination of activity and colour - keeps Mr FCMF content];
* ember tetra [for their colour albeit I've rarely found them that colourful in LFSs];
* habrosus cories (if LFS is able to order some more in) [as bottom-feeding fish, now that none of the remaining inhabitants scavenge for fallen food];
* the fish in the previous link [as bottom-feeding fish, with varied behaviour from current stock].
I have slight reservations over the 3rd and 5th, as I fear their small sizes may be at risk of getting stuck behind the filters; while filter wool can be helpful, a downside of my current main filter is the way that the bottom part floats out/away from the glass. The 4th and 5th are probably 'required' more than the 1st, 2nd or 3rd, while the colours of the 2nd and 3rd are probably the most tempting.
Shame there's not a colourful species of mini bottom-feeding fish as that might "fit the bill" perfectly. Shrimp might take on the role of scavenging for fallen food but I don't think I could handle witnessing them eating a dead fish or me finding a semi-eaten body or a skeleton... and maybe the same also applies to the 5th option above and potentially an albino bristlenose plec. I know some folk have said they haven't witnessed this but, if what occurred earlier this week when the second of the two female tetras succumbed during a few days' break away, I think the temptation might have been too much if I'd had any of these inhabitants. Maybe I need some sort of "therapy" to get over my heebie-jeebieness of such scenarios!
QT is set up with silk plants and ornaments in lieu of real plants, with an old mini catappa leaf from the main tank and a couple of new mini ones, minus the filter media, ready for the new arrivals once ultimately decided upon and purchased.
Views / additional suggestions welcome; thanks.