Werewolf/Wolf Rengar
It would look really cool with his character model and even though Warwick is kinda a werewolf he doesn't really have the vibe that Rengar could give with his model. Rengar is a lot more AHHH in your face fight me/I'll rip off your face before you can even say help but Warwick is more I'll slap you till you die than if anyone wants to fight I'll life steal battle you for 15 seconds
Rengar
http://media-curse.cursecdn.com/attachments/67/76/f5fd4e435d98b5adbc0008602ad99ce0.jpg
http://fc08.deviantart.net/fs71/f/2010/079/3/8/WEREWOLF_3_by_el_grimlock.jpg
Warwick
http://img3.wikia.nocookie.net/__cb20070918120817/harrypotter/images/4/4b/Werewolf.jpg
