I don't know if he is known on this site, but Dan Bull (or Doughlby) is a british rapper that is imo, extremely good, funny, and internet aware (so-to-speak). At present he is rapping about popular video games, but he is also an activist and has a gaming channel as well.

Please take the time to look at his work; he really is good. He makes raps frequently. (on average, about one every 1-2 weeks, complete with original instrumentals (sometimes done by others) and catchy choruses.

Here is his latest rap, about the game watchdogs that is coming out on the PS3 and PS4: http://www.youtube.com/watch?v=cyS7F1caVCI

And here is a unique rap he made by using homophones instead of rhymes about the upcoming game, The Crew: http://www.youtube.com/watch?v=l4o6SffgE_M

He has a bunch of other cool videos and raps that I think a lot of you would like. Give him a try.