It looks like Xils-Lab have a Roland VP-330 emulation. But it unfortunately uses iLoc or eLicenser. Can't tell about how well it emulate.
It looks like UVI has a Roland JX-10P emulation that don't seem to be a good emulation and unfortunately uses iLoc. It can be done a lot better.
There is a free JX-8P from developer Martin Lüders. That do it very good i think even if it's not 100%. But something to refere to and perhaps a developer to work with on a JX-10P.
This Jx-8P is not a JX-10P. It lacks the layering and the speciel Chase function and the sequencer. Also the JX-10P has some playmodes not needed in JX-8P.
Also the Jx-8P might lack support over time, as it's a free synth.
Still the digital JD-800 both could be an alternative and another synth to emulate even if it's digital.
I can't find a Roland SH-1000 emulation.
It's hard to find synths to emulate if they have to be analog, vintage and perhaps not made allready in a okay version at least. I think it should have it's own sound.
But if possible the JWM Electronics thunderchild used on Jeff Waynes War of the Worlds album could be fun because only a few was made.
Also Con Brio ADS 200 if possible could be fun i guess.
Perhaps also: Korg Sigma, Farfisa Polychrome and/ or Soundmaker, and Moog Prodigy as i like it but perhaps it's to similar to the Mini V and Memory moog may not add that much to Arturia's products, Formanta Polivoks do have some power.
Improvements of existing Arturia synths is allways good.