Been having alot of success with Mundo supp.

So this pretty much started as a joke in a game where someone auto locked Kindred and went adc... I picked a sup that I felt I could carry with if they were terrible. (they were); but I've played it a few times since and it actually feels very effective right now!
Mundo builds health anyway, so it's not like buying
and
slows him down too much. His poke is strong, and because he has no mana, he can out last a lot of other tanky supps with high costs during lane. After 6, If you can get between the enemy lane and their tower your practically guaranteed to kill them both! With your ADC's help of coarse! :P
End build looks something like this:
and 
Try it out! It's pretty fun!