Uncle!
And great closeups, by the way.
That's definitely a Viburnum, and likely one like Viburnum recognitum or Viburnum dentatum - which are kissing cousins.
Apparently that is the only viburnum of it's kind in your landscape, or it would be full of fruit. I'd vote to add another selection of Viburnum dentatum (Arrowwood Viburnum) so that you get good cross pollination between plants, and you will find loads of blue fruit next summer.
Your pollinating insects will thank you, and your winged brethren will love you.
