banana republic isn't timeless and basic. It's boring. I'm sorry. Unles you have some real swagger, creativity, and personal style (which most BR/jcrew shoppers don't have), you're going to look like boring joe six pack. Post some fit pics and prove me wrong.
Personally, I think BR is not only timeless and basic, but, rather classy.
Fashionable/Fashionista material? Absolutely not. You can't walk the runway in those clothes.