You know what champ's super OP?

Bard.

Too bad he needs teamwork like a cancer child needs chemo.

Edit: If you want a reference for how stupidly strong he can be: http://www.lolking.net/champions/bard&region=all&map=sr&queue=5x5&league=challenger#statistics

Winrates may not be what you judge "healthy and balanced" on, but there's some causation to this.