Not in any order

Nocturne
Nautilus
Lee Sin
Shyvanna
Mundo

lee sin evelynn nocturne amumu and veigar

Shaco - cuz he can jungle without leash (im a bad leasher, when i leash my jungle die or I steal his blue )
Maokai - his root ability is awesome
Shyvana - she is half dragon, do you need more reasons?
Amumu - his jungle is ok, and his late game is OP (and he is a mummy)
Teemo - :P

Malphite - Has potential to shut down any team and his jungle sustain is amazing
Shaco - Level two ganks, going straight from blue to red(Possible invade)
Shen - Post 6 ganks are as simple as a good bait
Janna - Once you learn how, she is amazing. A knock-up and a slow AND a shield that buffs your lane? oya
Skarner - Good jungle clear timers and post 6 his kills are promised.