Gragas and Mord

Talon

Fizz, Karthus, LeBlanc, Kassadin

Everyone with a little range or/and sustain...

Anyone who can interrupt a channel. Brand also works well.

Anyone with a skillshot ability or a gap closer can hurt him pretty bad.

Anyone not Vlad can do better in lane than fiddle pretty much.

Those with gap closers/escapes and big burst are typically better however.

i feel that fiddle is such a weak ap mid that almost anyone skilled can counter him. Just be aware of the silence and drain. I outplayed a fiddle in mid yesterday as swain.