If the animation is not quite how you want it, you can easly tweak it by using Unity's built-in IK. This is just one of the ways to do it, but it's very powerful!
Animations used in this video are available for sale here:
https://www.assetstore.unity3d.com/en...
Music by Jędrzej Kisiel (my brother!)
check out his promo merchandise store:
http://www.paleton.pl/en
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UE4 and Unity animation store:
http://www.kubold.com