im pretty sure 10 bans is only going to be in the LCS. not normal ranked.
honestly id drop naut if you are looking for pure junglers. he isnt a great jungler, but he is a monster support and top laner so if you need a go to champ for support then id definately recommend naut.
Fiddles is good if you understand him. sadly ill never be good at fiddles.
Yi is a 450 so like...... just buy him.
Udyr is like 1350...... just buy him.
Voli is fun and can be strong also with the returning tank meta i think he will be stronger than ever so id definately get him first.
Also have you looked at hecarim? he is very flexible at the moment and with such a simple kit i doubt they will ever truly gut him so he is a pretty safe buy. Most of the power you are seeing lately is from CoTC. so after that is nerfed he will fall off slightly, but still be strong and any future nerfs will probably be to his E to reduce his burst which isnt a big problem since he is more of a sustain damage champ anyway.
Also i know he is like permabanned but sometimes lee sin makes it through draft and he is the god jungler.
So as a final thing id say pick up all of them. udyr and yi are literally braindead champs. a fucking hamster could play them which makes them great for climbing if you are in bronze and silver. id give gold a little more credit but if you learn their nuances then you should be fine. always. ALWAYS have a pocket AP pick. i have Ekko because he isnt banned much anymore. and also Voli is gonna be a monster if the tank meta fully returns