I recommend Udyr, His stuns and amazing scaling of his abilities are ungodly. He has insane survivability, an amazing counter jungler, though I feel his ganks are a bit lacking, But that's easily rendered by Flash or Ghost, some people argue Flash is better, but I tend to disagree Ghost and Bear stance pretty much guarantee's no one gets away.
As for Udyr's runes, I reccomend Aspd or Pure AD depending on wether you Tiger jungle or Phoenix Jungle. ARP doesn't scale well with him. For Phoenix Jungle, which is arguably one of the fastest Jungle clear times in the game currently run ASPD, for Tiger which is more based around ganking run AD. It's all about learning how to stance dance with Udyr you can build him tanky and still put out quite a bit of damage. Your stuns are invaluable after laning as you can literallly rotate through the entire enemy team and stun them all. His Phoenix does great AoE dmg and then switch to Tiger to get the Phoenix AD boost and apply a hellacious Dot. So basically.
E>R>Q>W, for and just rotate through trying to keep Monkey's Agility at 3 at all times, Switch between Turtle and Bear if you're taking alot of dmg or if you'd keep the enemy team stunned.