Who have you all had/seen perform just as well as ever in s5. I have seen some decent Hecarims, Shacos and I just played as nunu for first time in ranked jungle and he was ezpz... I am thinking people just have not tried a lot of the characters available in the jungle... its not such a scary place...
Aatrox, Kha, Shyv, Voli.
How has rek not made it on this list
Vi, Yi, Xin, Tbh i think xin is under rated as a jungler and could be top tier.
Tryndamere. He has good ganks, can dash over any wall, does really good damage with just a Devourer and can sustain the jungle indefinitely using Bloodlust.
I haven't looked at anything but the title of this post before posting this because I'm sure no one has commented on him. But there are too many important things that he's good at that are keeping him from being anything but good in the new jungle. Y'all noobs are welcome!
WQE. Max priority: R>Q>W>E
w/Juggernaut, 
w/Furor,
, 
, 
, 
(frozen heart, Iceborn, banshees, merc treads and jungle item w/warrior all back up choices based on enemy team)
AD/Bruiser runes, Ad/Tank(9/21/0) masteries (with jungle specific masteries)
clears full jungle without backing. -gromp w/smite, blue, red w/smite, raptors, [gank], wolves w/smite, [gank], Krugs, then Gromp or back.
First back w/out gank kills should net you the stalker blade, and atleast a ruby crystal, if not kindle gem.
Ganking pre-6 relies on laner cc, or pushed opponent.
I've only been playing sion jungle this week, but every game has flowed pretty much like that for the starts.
all seem very competitive
i've also found 
do pretty well, but not as well as the former 3 or the two you listed.
Sion is quite effective.
survives well. And she can do rather well with a lv 2 counter jungle. If they start blue grab your prefered buff (I like red) then go straight to the bush behind their red. You should make it since most start group then blue then red.
Anyways. Chill in bush behind red (the one where when you come out you be behind them) and wall slam them while their low and 1 Q could kill them or at least send them flashing.
A good side note is to smite red right when you come out so they can't for the heal.
shaco does well but he takes practice, but as evident from your post you've seen that, other junglers though would be trundle, volibear and skarner they all have good clear times and either good tanky stats or good sustain. ive also had reasonable success with amumu though his first couple clears seem a bit rough. from what ive seen cho'gath does really well i personally have not tried it yet as i am a really bad cho'gath. udyr and shyvanna both do well. also rengar can work but you have to be very careful during your clears as he doesnt have the best sustain.
I now Olaf can be good and I guess Nidalee is now a top pick as well.
Aatrox, Trundle, sej, amumu, voli, Cho, Jax, Maoki.
Some can actually do a full clear in one run, it depends on your rune set up and how confident you feel playing them.
