If Stuart's hit on Landeskog, which had a VERY questionable elbow follow through, is deemed clean, then Olver's is nothing at all.
It's truly not good that a player of Tarasenko's caliber got injured, but he's acting like Olver just Bertuzzi'd him
__________________ There but for the Grace of God go you and I, we're the brightest objects in the sky. Remember there but for the Grace of God go you and I, do some good before you say "goodbye" - Paul McCartney
If that is the criteria then Olver's shoulder pad is directly in Tarasenko's face. Not sure about putting his head into a bad position as he's turning.
It is, however his arm, hips, whole body hits Tarasenko at the same time, thus it's incidental contact with the head. If his head was the only part of his body hit, then it would have been a penalty(and probably suspension). However, it was a full on body check.