Ether is tight, Super Ugly is also good...

The best diss tho would have to be the Eminem diss by ICP. I dont listen to insane clown posse, but i heard this one Em diss they had called " Slim Anus" and it was a diss version of " my name is". It's funny as hell and it has lines such as " Slim Shady you a cutie, I'll make you famous if you lemme up in that bootie", and disses both em and dre.