I disagree.
He did inherit Chara, Bergeron and Rask but that non-playoff team in 2015 also had tons of dead weight and was over the cap. He moved out Eriksson, Lucic, Soderberg, Smith, Spooner, Kelly, Cunningham, Svedberg and Seidenberg among others, and by the time they went to the Finals, had replaced them with McAvoy, DeBrusk, Carlo, Coyle, Mojo, Heinen, Kuraly, Wagner... There was a lot of roster building, turnover and development to go from the 93 point team he inherited to 112 points in 3 years.
Every GM inherits players. You want to give Chiarelli credit for the 2019 Cup final because Bergeron was on the team but Bergeron, Krejci and Rask were all drafted by Mike O'Connell.