I'm looking for a consistent jungler, who can be played into most matchups and teamcomps, has a decent early game and good late game, and not to mechanically intensive. Here are the champions I own: jax amumu rengar master yi tryndamere udyr warwick
I'm looking for a consistent jungler, who can be played into most matchups and teamcomps, has a decent early game and good late game, and not to mechanically intensive. Here are the champions I own: jax amumu rengar master yi tryndamere udyr warwick
Out of those champions, I would really only recommend Warwick if you're looking for a well-rounded jungler. His clear speed is a bit on the low side but he does have good sustain in the jungle, he doesn't really need his ult to gank (and his ganks get even better with his ult), his only spell that takes any skill is his ult and he's pretty good at dueling people and locking carries down.
The build I would recommend is Cinderhulk and a Titanic Hydra, then full tank after that. Once you get the hang of things (or if you snowball early), you could add a Trinity Force into the build to increase your damage.
out of the list you provided and what you are looking for
would be the two i would consider.
jax, yi, tryn are all great if they get fed and cant be shut down... rengar is just so bad udry is worst then rengar
but to be able to have consistent games and be effective for all comps id stick with amumu and warwick
buy 
abuse him for the next 12 patches till they finally do something about him and you literally dont even have to kite camps just click 2 times.
Who do you like the most? That is who you should main.
If you are equal with all of these champions and play them to same efficiency, my reccomendations (this will change based on who you ask, and your division)
Tier 1:
are the most consistent for a basic jungler. Good clears, and decent, steady power. Warwick has more impact early for sure, and more tankiness, but yi is about as low mechanic as you can get (he has an auto reset on w and a dodge on Q. That's it) and requires more thinking about what you do than out putting what you need to do.
Tier 2: 
basically repeats of the tier one. Amumu is the best teamfighter on this list, but he is also maybe the most team dependent. Consider building full ap grenade amumu if you want to play him. Pretty useless if you don't hit your skill shots, but my buddy is maining amumu to good success in our mid-high plat games, and he gets better the lower you are in divisons as people play against him worse and his weaknesses are less pronunced. Jax is like Yi, but you trade a little bit of damage for extra tankiness and CC.
Tier 3: 
These both are high damage picks that really need to snowball hard to be effective. I view tryn jungle as a worse Yi in every regard, and rengar has gotten nerfed back to back one too many times to be good for bad/new junglers.
Tier 4: 
R.I.P Trick2G. Udyr can still be effective, but it takes a lot of work and map knowledge to play him. If you know how to manipulate the map, he is a tier 1.5 jungler in my opinion, but if you don't, he is super bad. Takes a lot more work than everyone else on this list to be effective.
