I noticed when you draw a path with the triangle in/out/ellipse effect, it applies a pattern along path which accomplishes this effect. This is great!... However seems to be limiting what I am trying to accomplish:

Both snakes in the screenshot are based on the same path. The left is simply a path with the ellipse shape applied, the right is a Pattern Along Path with scales.
I would like now to combine these 2, so that it is a scaled snake which is tapered appropriately. Unfortunately, I have not been able to find a way to accomplish both at the same time as they override/break each other. Basically, I am trying to put together some tools to help illustrate a "realistic" kind of snakes. I've seen this done quite well with bitmap brushes, however for obvious reasons I'd rather have this in vector format.
Any advice? Being able to generate great drawings like this in vector format would be so great for my workflow!
Thanks for reading.
Warm regards,
Teddy