So, I've been dicking about with tanks for a long time, and I also really do like the Jungle role.
Malphite has become my main champ, and he proves to be sufficiently tanky, but able to put out a crapton of DPS when needed.
This morning I actually wrote up a guide on how I like to run him top lane AP, though I'm sure something similar would work in jungle--going first for a Spirit of the Wraith or Spirit of the Golem, depending on your preferred style.
He's a ton of fun.
http://www.mobafire.com/league-of-legends/build/what-is-this-movement-speed-you-speak-of-400587
(Any feedback on how he plays for you would be much appreciated if you decide to try him out).