For Blender users, importing the bvh samples from fuse into blender seems to work ok. Import them into a blender scene and chain them together, and you should be able to get something going.
Disclaimer. I am not a Blender user. I was able to import BVH data and see all the animations I put in it. It makes the skeleton from that.
Do note that BVH is great, but a bit noisy, you may need to spend a day cleaning up some rotations.
The good news is, only once. Once you have a working one, you have it forever, and you keep attaching you intended mesh to it and saving out a new blend file.
I am sure there are tons of tutorials on getting BVH files into blender and editing them as needed.
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