Don't you think, that at least asking for a permission to use animations would be good idea?
Personally I don't think, that these standing animations look good together. Original one and right one are very official. If you want it to look "less robotic", you should use animations where soldiers stands in more "bored" positions. Like in Empire Total War, where differences beetwen animations are smaller, but soldiers are more human than in NW. But it's up to you to decide.
For permissions, I normally like to ask for the creator's permission when I've finished adding them
Just in case I decide to change before release, and so that I have a product to show the creator. So if you see your stuff in screenshots for updates, don't worry, I will ask for your permission, I'm just making sure it works in the mod XD
For the idle animations, if you know any others, let me know
I'd love a little more diversity among the troops...