Here are the top 10 most played heroes for each skill tier as of the start of Season 9 (3/1/18)
Bronze
D.Va
Mercy
Junkrat
Moira
Reinhardt
Soldier: 76
Lucio
Genji
Roadhog
Ana
Silver
D.Va
Moira
Mercy
Junkrat
Reinhardt
Soldier: 76
Lucio
Genji
Roadhog
Ana
Gold
D.Va
Moira
Mercy
Reinhardt
Soldier: 76
Junkrat
Genji
Roadhog
Lucio
Ana
Platinum
Moira
D.Va
Mercy
Genji
Reinhardt
Roadhog
Ana
Zenyatta
McCree
Soldier: 76
Diamond
Moira
D.Va
Genji
Mercy
Roadhog
Zenyatta
Ana
McCree
Tracer
Reinhardt
Master
D.Va
Moira
Mercy
Genji
Zenyatta
Roadhog
Tracer
McCree
Ana
Winston
Grandmaster
D.Va
Tracer
Zenyatta
Moira
Genji
Roadhog
Lucio
Mercy
Winston
McCree