I would have to agree with the majority on this one; Brad Stuart! Matthew Schneider was a big part too though. He was a pretty clutch guy in my opinion. Always liked him.
But I will tell you the worst... Kyle Calder, that guy was just plain awful when he came here, but then again I didn't lose any sleep over trading Jason Williams either.
***Side note*** For those of you upset about giving up a 1st rounder for Quincey look at the list of trades in the OP and notice that all the draft picks we gave up never really turned into anything special; The only one that is somewhat decent is Tomas Fleischmann.
Mike green turned out to be a pretty good forward lol.