As a support? You wanna play someone who can eat a lot of damage without outright dying (Braum, Taric, Tahm, Blitz, etc), and someone with a good amount of hard CC. My favorite pick into him is Blitz. You W, run through minions right into their bot lane, pop R and E him (he'll dash), then Q him back in and your ADC finishes him.
He's really good at farming under tower like Ez, so don't push him into tower.
If you're not comfortable with the all-in strategy, play someone with a lot of poke and peel (Karma, Sona to an extent, Brand, Zyra, Lux, etc.) and just poke him so much that he can't go all-in and kill you -- but you can stop him if he does.
So, who works against him (as a support)?: Alistar, Blitz, Voli, Naut, Thresh (to an extent), Leo, Janna (for disengage, but not killing him), Karma, Lux, Zyra, Brand, Vel'koz (to an extent), Taric, and so on.