I don't think either one of those will help you get cross pollination with 'Blue Muffin'. Why not get another Viburnum dentatum cultivar? Look at the first post in the thread linked below for a list of possible plants.

By the way, Viburnum juddii is a hybrid between V. carlesii and V. b1tchiuense. No need to get another one of those if you already have one.

Here is a link that might be useful: Viburnum dentatum and friends

I've had V. 'Blue Muffin' for several years, and 'Red Feather' as a pollinator, but I've yet to see blue berries. The birds seem to polish them off before they every turn color. Very odd.

Thanks. I got Chicago Lustre. We shall see.