For a while Mojo was the best, since he stopped posting as much prole and eel have killed it day in and day out. dcharlie is great whenever he shows up.
But my choice is Oscar The grouch, since he started posting more often dude brought the lulz like no other, keep up the good work, mang.
Honorable mention: lennedsay for being a girl who's actually funny.
Dishonorable mention: Himu for being a gay whitey.