How about a native american champion?
I think this picture gives a general idea of what to go off of :)
His abilities can be the usual Native weapons (Tomahawk, Bow and Arrow) maybe he could either have shaman healing abilities from the great mother earth or have different shape shifting abilities due to spirit animals? Possible Wolf transformation like Nidalee's cougar? even though we have Warwick, we could use a true native. I personally am working on a project where my wife and I buy land and give it back to the natives, so maybe we could collaborate and each buy sends money to us and all of it will go to our foundation (E.A.R.T.H. - Extending Awareness Reaching To Heal. we're on facebook and have our website with sponsors waiting on us to say the word, along with partners preparing to work with us and these sponsors)
but alright, quick recap of the character:
Bow and Arrow: (not main because we have plenty of those, but used like gangplanks side arm, you decide what effects it causes whether it does or not) Tomahawk: (could be used like mundos cleaver, again, decide what effects it causes) Healing Ability: (like nidalee but make it anyway it seems fitting where he could make a grunt noise or native war cry or even say something like "For the Great Mother" whatever seems fitting that you can come up with or add on to for how it looks also) Wolf form: (again like nidalee and elise but not sure how to make it unique from those two or even if it was similar to keep the gameplay of LoL familiar for the player, what abilities would be there? we'll have to see :P )
the picture attached is a basic outline to work with, make him look any way you decide, this is just a reference to an idea ;)
<3