Top Ten is tough.
No particular order:
Jean Francois ("I am, your friend")
240 (epic conspiracy theorist, witty, sharp mind)
True Adonis (the devil's advocate)
Johnny Falcon (there is not another mind like his)
Goatboy ("4 words....need pics of butthole")
Tito ("are there things?")
Squadfather ("oh brother!")
BigCyp (dude is comedy gold...no one makes me laugh harder)
Vince Goodrum (say what you want but he brings it)
onlyme (wealth of stories and knowledge...great guy!

)
There are certainly others, but these have provided consistent entertainment and funnies!