Imo all of the previous junglers are still strong.
1.) Dr.Mundo (clears jungle incredibly fast and takes hardly any damage taken)
2.) Trundle (clears jungle very smoothly with hardly any damage taken)
3.) Amumu (clears jungle at a decent rate still)
4.) Maokai (His aoe is still good just have to start wolves now and no longer wraiths)
5.) Nocturne( He can get level 6 fast and the new machete upgrade helps him a lot)
There are other junglers that do well. Since the new patch almost anyone can jungle that has decent CC. They added Machete upgrades for casters, tanks, AD. Feel free to try what you like.