Euro pears are good, although I've had deer rip a pear apart.

Deer will pretty much rut any new tree they have a mind to. I don't know that sour cherries are especially attractive to them for rutting.

They do like the foliage of sour cherries - as well as apples.

Either way, I'm not sure I'd base my planting decision on things the deer don't like, rather on fruit that I like.

I don't think that we have a problem with rutting- we're urban and the deer come from a local park, so I've never even seen a buck. I've seen does grazing on our front stairs, though, inches from the house. They're fat and bold, and love to pick all of the blooms right out of the garden. I don't really think that I can prevent them, just they apparently went crazy for my neighbor's sour cherry tree last year, and killed it.

We like pretty much everything, so it's really just finding a starting point.

Too bad your husband is allergic to apples because a crabapple with persisting fruit would seem to be a good option. I've seen a peach tree in someone's front yard and I wouldn't recommend that.as the fruit got messy and the blossoms on peach trees while nice are too small in my opinion. If a Euro pear doesn't work, how about an Asian pear? The Asian pear does favor a very upright growth habit (at least mine does) and that may or may not be up to your taste.