That would be a monstrous synth (I don't thing it would even be feasible, let alone manageable).
Imagine something that has ALL the modules from the Modular V, the digital part of Prophet VS, the sampling + resynthesis + additive from the Fairlight, the filters from all of them, the sampling + resynthesis + FM from the Synclavier, the FM engine of the DX7 V... well, you got the picture