From active, Gotta be dimitry Makarov.
Season after season Makarov is simply out of shape, but he can play the KHL, isn't even that bad in there.
Also needs to be mentioned: Jere Karalahti, who used cocaine, Alcohol and other stuff and was hang over in the games, played the tough pre lockout NHL very well for an violent alcoholist. He was very talented, he never really trained until his late 30's. He actually dropped from NHL only because he declined to take part of NHL anti drug program again, after getting (not for first time) tested positive on heroin / cocaine. Despite all of these problems he actually played quite well in NHL and made a good career overall.
Jere in his last years of career:
At the last 5 yeras of his career, he actually god rid of drugs, partly even alcohol. Also started to train hard.
He is commonly known as a positive comeback-from-drugs story in Finland:
He was probably high when he tied the game against Russia in World Championships when only 2 seconds was left of game time. I'll always remember Karalahti positively, what a lion, despite all of the attitude problems and other problems.