Juggernaut (not the Class) Champion?
So I had this idea. Ok, idea may be a bit much for the thought put into it.
But imagine a juggernaut (think the X-men mutant) champion where all he does is run. Like a permanent Sion Ult (Sorry Sion), but it does less. No CC unless it's reached a certain point, or maybe the champion just knocks them aside and keeps going, or maybe he bounces off of them. IDK. Maybe throw in some Poppy charge mechanic.
But he can't stop or change direction either. Or changing directions is his abilities. If he hits a wall, he just bounces off and starts running again. Think bumper cars as a champion.