Many orchids are fragrant, but a few really stand out. Right now on our back porch we have two that are absolutely yummy. The top photo shows Epidendrum (alatum x bractescens), also known as Encyclia (alata x bractescens), has a strong but very pleasing sweet rose-like fragrance most noticeable in our environment midday. Simply step out on the porch after lunch and inhale, and you'll smell the plant 4 feet away. Like most Encyclias, the plant has a high flower count and fat, round pseudobulbs.
The second photo shows Maxillaria tenufolia. This species always shows up whenever there is a fragrance class at a show or meeting, since it has an unmistakable and irresistibly yummy coconut fragrance. The plant likes medium to high light and is something of a climber, so is a great plant to grow mounted. You can also grow it to a nice specimen size in pots or just divide it every few years to share. I've recently divided up one plant and as soon as they seem happy in their new pots I'll be listing them on Etsy.