I would recommend Warwick.
He’s a fairly simple character, but with a lot of skill expression.
His Q bites leeching health and giving him a short unstoppable.
His W goes move speed, attack speed and psuedo-vision.
His E gives damage reduction and a hard CC
His ult is a leap (with unstoppable) that suppresses a single target.
Can be built as either tank or bruiser.
Sounds like johanna and ETC combined?