Quartz Composer has an irritating problem: 3D meshes don't exist nicely alongside its 2D display elements, so you gotta do workarounds involving Render in Image. The QC sites seem to be of the opinion that Apple's just not bothering with it any more...but Applescript still exists and god knows they've let that languish before.
Anyway, now that the 3D issue's workable, though, other tools that are easier to operate than Blender can come into play.
One's the open-source Meshlab, which I am capitalizing because fuck lower-case. It makes 3D objects quickly and easily, although some of the menus stretch past the bottom of my laptop's screen and are thus unusable. Open source! Also the .dae files it makes don't seem to get read by Quartz Composer so I run them through SketchUp first, which exports a nicer .dae. It's faster than it sounds.
Another pretty easy thing to work with is Makehuman, which I haven't done anything with. That I can show in public. It has a genitalia slider control!