I've got https://github.com/Ybalrid/Ogre_glTF/ working on Ogre 2.3, but I have sunk HOURS trying to debug loading the skeleton/animations on a particular mesh (unfortunately this definitely isn't my area of expertise).
I just feel like there may be some flawed logic somewhere in the skeletonImporter file, which causes Ogre to produce NaN values.
If anyone could take a look, I opened an issue on the plugin here: https://github.com/Ybalrid/Ogre_glTF/issues/32 (contains the location of the assert)
A side question, are there any alternative gltf loaders for Ogre?