I would like some advice on even more junglers that i don't own, I am going to mention the ones that I may buy and I want to see what input you have:
(NOTE) Rek'Sai was not my favorite playing her. I am unsure on buying her 
(Saving Up For Nidalee)
It really depends on your style of play, currently the meta favors tank junglers like Sejuani, and Gragas but that isn't to say you cant find success on other junglers. The two top junglers you put, Nidalee, and Lee are very good control/aggressive junglers that can duel any other jungler early and usually come out on top. If you like that style that means you should focus on getting bruiser brawler type junglers that excel in the 1v1.
I would suggest Xin Zoa, Pantheon, and Olaf as they are brawlers that can exert early pressure. Also junglers not on this list that I would suggest are Gragas, and Vi since they are also good brawler junglers with decent early game but also scale pretty well.
Almost always have the most damage on my team with xj9 vi build. But if you want a god in your face tank then grab voli. New botrk will make shiv even stronger so another good pick.
I personally love playing , he has a strong kit and synergizes excellently with Cinderhulk. Build him full tank and you gain access to one of the strongest executes in the whole game. He is also a great split pusher and one of the few true duelist tanks (right there with Nasus).
I'm not a huge fan of , but that's just because I have terrible luck playing him and just can't seem to get his kit to work for me.
is quite fun, and his team fighting is great. His ganks got hit preeety hard by the preseason nerf to powerball's cooldown, but only in terms of the speed at which you can chain gank, not the actual effectiveness of the gank itself. If you build more like a fighter by buying things like Zhonya's and Abyssal scepter alongside lots of armor+HP, you deal a ton of mixed damage while being tanky as all get out.
I don't play , , , or so I can't really help your decision about them reliably.
is a sort of "all or nothing" early game champion, where if you don't capitalize on your early damage and superb banks, you become very, very useless to your team. He does best when you have strong hyper scaling laners that you need to snowball who you can trust to play reasonably well once your usefulness begins to decline. I'd say play him at your own risk in solo queue, but with a group of coordinated buddies he can be amazing at getting your team a big early advantage.
is one of my favorites. He is simple to learn, has a lot of cool strategy built in, and has excellent clear, sustain, ganks, and team fighting. If your team already has other reliable tanks, you can play him as a super manly AD assassin and murder the enemy teams ADC with ease.
I'm not 100% sure about, but she seems much better as a top laner just because she is too gold dependent for the current jungle. She is a strong, fast clearing jungler, but her ganks are mediocre and power farming jungle isn't very effective right now.
twitch.tv/jester311
don't forget about the champ.
He's personally one of my favorites right now and just a lot of fun to use personally. He's pretty tanky and his passive can keep him alive in a pinch (Just don't go in too deep cause you can still die). Pretty simple to play with a Q that really pressures out flashes a lot of the time. Maybe not the "best" out there but I have the most fun with him.
Xin was my first jungler, my friend taught me the jungle route which tremendously helped me. (Gromp>Wolves>Golems>recall)
