By the time Marian Hossa arrived in Chicago, he had already accomplished quite a lot in the NHL 

As an Ottawa Senator, he was a two-time All-Star who had two straight 70 Point seasons.

Patrick Sharp played the bulk of his career with the Chicago Blackhawks, where he was a major part of their success in winning three Stanley Cups (2010, 2013 & 2015).  Sharp was a solid goal scorer for Chicago, finishing 8th (2011) and 9th (2014), and he was regarded as a decent two-way player who would earn votes for the Selke Award.  The Left Winger was excellent on the penalty kill and would lead the NHL in Short-Handed Goals in the 2007-08 season. 

Tony Amonte is one of the best American-born scorers in hockey history, and the Chicago Blackhawks were fortunate to have him when he was at his best.  Amonte attended all five of his All-Star Games while playing in Chicago, where he scored 541 Points for the team. He also had three 40 Goal seasons, two of which were good enough for second- and third-place finishes in the NHL.

Depending on who you believe, Ed Litzenberger was traded from the Montreal Canadiens for Cash in the hope that it would help what was a struggling franchise.  If that is the case, it was a massive gift as the talented forward would be named the Calder Trophy winner in a year he was traded.  He was not a one-season wonder, as he would be named to three All-Star teams as a Chicago Blackhawk and would finish in the top five in goals three times.  His best season was in the 1956-57 season where he was fifth in Points and the NHL leader in Even Strength Goals with 30.