Know of any decent Underground Rap/Hip-Hop Artists?

Hello All!
This is my very first post and I'd just like to say "Hi!"

Anyways, I'm a fan of the rap/hip-hop genre, and I've noticed what I'm hearing on the radio these days is pretty much garbage with catchy hooks. I was wondering if anyone knew of any non-mainstream rap artists out there with some real talent and passion? And of course, here are two I'll leave behind.

-Atmosphere
-Magnetic North

Thanks!