A basic voice should have
3 wide range vcos or 2 normal vco and 1 vclfo.
I use four wide range vco (like Synthesizers.com vco)
2 envelope generators
I prefer 3
1 VCA
I prefer 2
1 4x1 Mixer
1 Lpf
From there you can do anything you want but I suggest that a ring mod is the next thing.
The above items are the ones you can't cheap out on. If you think you can play any well known e music with less than 2 egs you will be surprised that the sonic pop that is so satisfying is missing.
--
Gino Wong Birgelo
BSComm, BSEE, CG, ReRED, CSEC
Audio Mastering, Recording & Logistics, Analog Sound Design