At the moment Im very skilled these champions for ranked jungling
Nocturne - For being an off tank, when a tank role isnt needed
Naut - When much CC is needed, Tanky
Lee Sin - Counter Jungler
Skarner - When a tank is needed

Now this is where I need help. I find myself always doing good or at least doing decent with Skarner, but I most of the time seem to loose when I use him. Are there better tank junglers than Skarner? I really like him but keep loosing when I use him and this is very irritating. Whose better than Skarner? WW, Amumu, Malphite, etc. Who? Or atleast give some tips or tricks for Skarner.

Amumu!

I would have to agree - Amumu is a very strong tank jungle, especially when it comes to ganking. However, one of my personal favorite junglers is Udyr; he is fast, tanky, has cc, and can put out some good damage (especially early game if you max Phoenix (R) instead of his Q. He's also a great tank/off-tank late game.

Alistar and Amumu, Volibear is pretty good too.

not sure how Nocturne qualifies as off-tank but ok then

Mundo will never die once he reach lvl16. **** fast CD on his ult, makes him invulnerable.
Slow Slow Slow + Reg Reg Reg. super tanky jungler.

@cyanshock i build nocturne tanky dps, thus he is an off tank cuz ill get a frozen mallet, and/or atmogs depending on the battle

Definitely Amumu

Since amumu has been said, Alistar bro

maokai maybe?