Here is another photo

that second one looks a lot like valerian.

garden heliotrope

Had to go out in my garden and look at my white valerian and it sure looks like what you have there. Mine isn't short tho, it grows about 6 or 7 feet tall.

Valeriana officinalis aka Valerian.

Yes - my valerian, too, gets about 6-7 feet tall but when mine was just a little thing it grew out leaves that stayed pretty low like a hosta and had just one lone flower stem. It looked a little silly and then, the next year, shot up to 7 feet tall out of nowhere. Anyway, my vote is for valerian. To me, the blooms have a faint apple scent but its kind of muddled.

I too was given one by a friend, and I loved it for its attraction to pollinating insects, its statuesque flowers and its scent. However, I ended up removing it since I am not great about deadheading, and it self-seeds prolifically in my garden. It took me about 5 years of vigilant removal of seedlings to be free of it, so if you don't want lots, be sure to remove spent flower heads.

Second picture: also known as Valeriana sambucifolia.

Tall, fragrant and, as per nhbabs, found it too much of a reseeder. Got rid of it.