What jazz musicians should I start listening to if I am just a "beginner"?

I love all kinds fo music, but I know much more about classic rock and folk music than I do about jazz. A piece on NPR this morning made me realize I’d like to start listening to some more jazz music. I imagine more formally composed stuff (like Dave Brubeck’s “Take 5”) might be more accessible than improv but am open to suggestions. Got any?