Thank you for the replies. I'm digging in the avaliable manuals to check if they can switch patches with any midi message send by the OT. The Microbrute seems very nice (I love complex oscillators) but I do not see in its manual if it accept any MIDI CC or Patch change at all!
I'd like to read the Meeblip triode manual to check if it can change programs, but I do not find it.
The Boutique JX03 seems a solid example about what I'm looking for. The Bassstation too (but I think it's too limiting in its oscillator synthesis range). The NordLead seems interesting.
I have to read the refaces manual to check if they can switch their programs with midi.