Toplane: Cho Gath, eats targets with Ult Jungle: Volibear, doesnt directly eat someone, but takes a bit juicy bite out of you with Frenzy Mid: Fizz, feeds you to his pet shark with his Ultimate Support: Tahm Kench, eats you with his W.
Now all we need is an ADC who can eat or bite the enemy^^
But what about 
?! He is the mouth of the abyss.
There's only one eat the enemy set up
: top
:jungle
: mid
: adc
: support
All for one mode good luck not being eaten
Literally bites people....
Move Voli to ADC, put Nunu in as jungle.
Problem solved.
Well as ADC's are traditionally ranged, it would be hard to get someone to be close enough for their kit to allow a "bite" ability.
How the hell would a RANGED character have a bite? Unless they threw piranha at you or something... "Florin the Piranhamancer"! No wait, that sounds awful.
Trundle bites too
cougar form also bites r at least it looks like it with her takedown
