That is solely a matter of preference. What kind of beer are you making? What kind of flavours to you like? In what season will you drink? Who are you serving it too? ....And on I go....
Some have less aroma than others, but really, any hop will can be an 'aroma' hop, as they all smell. Galena is a 'bittering hop' mostly because of it's high Alpha content, as are most with that quality.
I personal like Willamette, EKG, Amarillo, Fuggles, Saaz, Halletauer, Centennial, Cascade, & Simcoe myself. There are many I haven't used though. But It's more about style, balance, and hop profile than it is about any given hop.
It takes a lot of experimentation, and personally, I wouldn't put too much stock in any one person's recommendations unless they give you the style they made, the recipe they used, all the other hop editions, (etc..) and then back it up with some type of award - in the absence of that, all you have, and all that matters, is personal preference.