New Jungler to Learn?

Ok so I'm looking for new junglers to learn right now and thought I'd ask the opinions of everyone here, the more information and opinions I have the better, basically.

Well, I have been a Rengar main for a while now, but not your typical Rengar main, I like to play him bruiser/tank. For a very long time I have, mainly cause I perform better on tankier champions, it's the role I've played for my team for a long while and even in other games I've always played the tank or at least someone hard to kill (DK in WoW, Zerker in TERA, Crusader in Diablo 3, Warrior in GW2, and so on). The thing is I'm HUGE into lore, the voices of the characters, their appearances, and so on, as in I won't play shit like Teemo, Heimer, Mundo, Ryze, and other champs I think look and/or sound bad, call me superficial.

This ofc led me to Rengar when I first started playing, he hadn't been released for very long, had a cool voice and lore, all on top of a very thematic kit, but the downside was he was an assassin (back in the days of his TripleQ). Eventually I learned him, got pretty good with him, all while still playing the first few tanks I even unlocked, like Volibear and Darius, and eventually started to just build Rengar as a tank/bruiser as well! It worked out great for quite a while, to the point when top Tankgar was OP as shiiiiiit and I jumped up from S4 to G5 in just a couple weeks lol He was then nerfed, but still viable, and finally reworked.

Even at that point I still played him pretty tanky, and eventually the meta shifted to actually favor tanks, so I was playing tank Rengar, diving backlines and being near unkillable while still solo'ing the carry or carries.

Eventually however the tank meta faded, the ADC meta came back, and the items shifted so that Rengar really only performs all that well as an assassin. I still like to build him tanky, but I'm now in a spot where nothing feels strong enough, carries have too much damage for backline diving as a pseudo-tank and I won't have enough damage to solo out anyone either, cause of how much damage they can all do now. The thing is, I love Rengar, but I don't like playing him as an assassin, it feels super cheesy, takes very little actual mechanical skill, and I'm used to playing tanks so will often jump in too early for an assassin or take cc for my other carries instinctively and just implode.....

So basically I'm looking for another bruiser/tank type champion for the jungle to add to my champion pool!

I play Poppy and Gangplank top (always loved the pirate, before and after his rework!) and I'm currently learning Irelia and the new Shen, cause he's not boring as fuck anymore lol In the jungle I used to have Aatrox as a backup, but he's just kind of a bad fucking champion in general atm, and I still like to play Skarner (again, before the first rework, after the first one, and again after this last one, I've always liked playing him lol) and some Sion from the jungle believe it or not!

So the thing is, Aatrox, Skarner, and Sion all feel subpar to me, I enjoy them and won't stop playing them, but I'm looking to expand my main champion pool for the jungle some more. Basically a fighter, someone who can 1v1 and/or tank decently well (doesn't have to be Maokai levels of tank or anything lol), and doesn't fall off ridiculously hard like Pantheon does :P

Any suggestions would be appreciated! I'll be working on maybe trying the new Shen in the jungle while I wait to hear some opinions lol

P.S. I will never play Kha'Zix, that bug scum.... lol Habit of a long time Rengar main who actually likes lore xP