League of broken champ (need 5 ban/team)
Simply request just 1 ban for all, because 3 ban is not enough and it is not funny to play against broken champion
Top
Jungle
Mid
ADC
Support
Simply request just 1 ban for all, because 3 ban is not enough and it is not funny to play against broken champion
Top
Jungle
Mid
ADC
Support
Half of the people you mentioned aren't OP. (I don't think so anyway.)
Powerful top

Powerful Mid

Powerful ADC

Powerful Support

Powerful Jungler

As you can see, the list gets quite extensive once you list all of the powerful champions. (If I even got them all...) Considering OP to be excessively strong, there are a few in there that are still far stronger than anyone else (Illaoi, Yasuo, Kogmaw) but for the most part each has their own unique strengths and weaknesses and still has plenty of counterplay. (Excepting Heimerdinger of course.)
But that doesn't mean your request is bad. It'll make the wait a little longer, but only by two picks.
and
are not overpowered.
and
and
are not overpowered.
is not overpowered.
is not overpowered.
is not overpowered.
is doing well because adc's are popular, and will fall in power when adc's die down.
is powerful simply because she hasn't been fixed.
is no longer powerful, with nerfs to both runic echos and udyr's direct kit.
is just being abused in the mid lane right now because of his flexibility. It's a short fad and will end soon when one of his counters becomes popular or some indirect changes makes him better in bot lane.
was nerfed this patch.