Interesting question, I am also currently looking for a compact menuless Env Module.
I currently use some make noise function modules (which i would prefer over the contour), some malekko Envelator modules and just recently added the dreadbox attaxia because its cheap compact and offers 2 Env or LFOs.
I would also recommend a function generator: Maths, Rampage, DUSG of Falistri (of which i only had the maths)
The döpfer A-143-2 quad adsr is also a nice and interesting env-generator, if you don't mind the optics and space.