Highly recommend the Dirtyave M8 [1] for a tracker fix that comes in hardware firm and is a gift that keeps in giving with increasingly good firmware updates.
I have the Polyend tracker mini which is excellent, especially as they're updating in step with their desktop version.
Also slightly easier to get hold of!
I really wish there was something between Furnace and OpenMPT - where you could mix hardware-reproducible chiptune sequencing seamlessly with more modern soft synth and samplers. Renose is plenty capable, but it’s felt awkward to fiddle with when I’ve tried it - I really just need to sit down and devote a period of extended experimentation to it.