I hit an owl once, cruising down a backroad at night I saw a flash of wing from the side and then something smashed high on the windshield and dead center.  From the thump I'm sure it was dead, should have went back and got some feathers.
Had a deer run full bore into the side of my truck as I was driving by, so I guess technically he hit me.
Scariest one by far was on my motorcycle, a large buck ran out from the side of the road at dusk and I swore he was gonna plow right into me.  He must have hit the breaks cause I cringed and tightened up waiting for the impact, but all I did was caught my pants slightly on his antlers.  Yep head down antlers just touched my pants flapping in the wind as I rode by.
Various opossum and groundhogs but their fat so it doesn't really count.
Saw a squirrel go under my buddies car and bounce off the muffler, he shot out the side and off the road, I was right behind him in my car.