Chali 2na and Black Thought. Aceyalone was pretty good as well ... by the way, it wasn't Alchemist that was rapping on FRGT/10 - Chali 2na did that - real well at that.
He was awesome, but so was Motion. If you listen to his lyrics you'll see that his are very relevent to the song. Sometimes you have to look deeper into the lyrics if they are spit too fast for you to get all down at once. Edit: Here's Motion's lyrics Hey, yo One thing, I don’t know why It doesn’t even matter how hard you try Keep that in mind I designed this rhyme to explain in due time All I know, hah, I so-socialse Like the host of the party I spoke, shaked, and made eye-contact Partied and toast strong, all that North, East, South, West coast I’m staring out the window No oppourtunity to mend tho I tried to sew it up to weaken your system I had you throwing up I brought you back into things Like the imaginary man of your dreams You’d always seem to make it worth it I pig-skin, I never nerf it You felt lovin nother brotha real bringing the pleasure By any means it means I’m leaving your team Hell of a team, man it seems I tried so hard