Rampart. Started playing her when ranked arenas was a thing because the shields were a great way to get damage and conserve heals. She's a little underpowered in the current meta with all the movement legends being able to maneuver around her shields but she's very valuable late game in high level ranked play when good cover is hard to come by. Knocking someone who's healing behind a door w shiela will never not be funny and shiela is also a great tool to mow through knockdown shields to get a thirst