About this model, I was thinking to finish the mounted version first and upload it, but I will update it eventually...
In the bundle is included unit and hero model.
Update: Added an edited version(Based on @TheDiscoKing's suggestions. @TheDiscoKing , thanks)
Second update: Added a mounted version.
Third update: Added only a mount model(undead horse)
Fourth update: the unused tracks are removed/lowered.
Or any other in game model.
I have used this tool to remove the unused keyframes: Model Optimizer and Converter v1.2.1
But on some models even if I remove those, they show up in the Sanity tool. But, after I check some more options in Model optimizer and converter(like "delete invalid keyframes", "delete same-ish keyframes") it does remove the unused keyframes, but the geoset animations are all screwed along with the particle emitters and effects, plus I get a lot of severe warnings in Sanity Checker after doing that...