My neighbor has a 12-foot evergreen rhododendron which perfumes her entire 2-acre property. It has light pink large flowers with yellowish throats. A single spray has scented my entire house. The fragrance is heavy and rich, like honeysuckle. Some people would find it too strong, but I just love it. We are in NY state, Zone 5. She has had this shrub for at least 25 years so it definitely can take cold and heat. The leaves are glossy and rather a light green. I took a picture of the blooms but it is (A) a very large image that you should not attempt to view if you're on slow dial-up and (B) a little washed-out due to the flash on my digital camera. I would gladly order one of these plants if I could identify it, and wait a couple of years till it blooms. If you are willing to take a look, here is the link:
Chris