all of PRO clan.  there has never been a greater group of cRPG gods assembled into one place at one time in history, the likes of which will never been seen again.  we breezed to individual 5:1 KDs on battle while never even talking about cRPG and laughing at "teamwork", having a 5x for about 2 months straight.  we would've been unstoppable in Strategus 
I will admit it was hilarious. Not a single word in that teamspeak/vent was EVER said about crpg except for laughing at winning. 
and pro didn't even have some of the best players in it, but it had some, and a lot of 
good players all at once.
People legitimately complained on the forums about pro clan existing. it was that successful. AAANNDDD then most of them quit/went back to their own clans.