MURS and Planet Asia are underground hip hop artists for the most part and I don't really know the rest. I've heard of Futuristic, Mike G and Trinidad but have never heard their music.
I'm sure they all have their own following and it's cool that they're even doing this.
Murs for example is training for this on his twitch channel Twitch.tv/murs
Yup i was gonna say all the 9th stuff is all about them love tracks. Murs is so dope live though so crazy on stage it is a blast to watch him try to kick himself in the head lol.