Twitch, Kindred, and Graves are all okay ish ADC junglers. Graves is probably the best; he can get by with just farming or applying early game pressure. Both are fine. Kindred is a bit difficult as you have to understand lane priority and jungle pathing in order to get your Mark's reliably. Twitch is probably the worst. His clear is bad, his ganks arent great(beyond the level 2 cheese), and unless you snowball, you're not especially strong.
If you dont mind off meta, I've been having fun with on hit AS tristana in the jungle. Bloodrazor, BoRK, Guinsoos, runaans and you get the option of Wits end as a defensive item if they have lots of AP or a frozen mallet or a GA. I take fleet for the jungle sustain, going down domination for more, but if you wanted, you could go for Lethal Tempo to break the AS cap or PTA for more damage in ganks.
It does a surprising amount of damage, her jump and red buff make for okay ganks and her ult post six can be used as gank set up as well. Your clears are rough early but if you kite well, you dont get low. You are fragile though and if you get invaded, you will likely need help. I also dont suggest this for ranked; it's a more for fun kind of thing.