How about a theif character with a pull and the ability to steal gold??? Could be a support.

So this characters abilities would be a pull like ability, so he can steal the enemy adc, a gold thieving ability that does minor damage and takes an amount of the enemies gold (maybe it only steals gold under certain conditions i.e. enemy just killed a creep or a champion and the user of this ability gets the gold instead), and an ability that makes a member of the opposing team invisible to THEIR OWN TEAMMATES as a disruption ability.