The Green Bay Packers are a good team with a good roster but without a lot of star players. Maybe linebacker Edgerrin Cooper can become the next game-changing player. NFL.com selected one underappreciated player from each of the 32 teams. Tom Blair selected Cooper. “Rashan Gary is gone, (Micah) Parsons and Devonte Wyatt are coming off season-ending injuries and there’s a new coordinator (Jonathan Gannon) and middle linebacker (Zaire Franklin) in the house,” Blair said toward the end of his explanation. “Cooper has the chance to prove he can be a steadying hand in Green Bay as he moves through his third professional season.” Cooper had a brilliant rookie season. He not only led all rookie defenders but he led all off-the-ball linebackers with 13 tackles for losses as a rookie. The big-play production dropped last season, with a half-sack and four tackles for losses, but he finished second on the team with 117 tackles.…