i would also say talon, he's awesome with ignite and flash and his ulti does everthing it should do

If you play mid than definitely Diana, she has amazing kill potential at level 6 and can easily kill most mages at 6 with here q-r-w-e-r.

Talon is good but in my experience he's pretty hard to get good with and still gets stomped out by a lot of mages.

Varus is a powerhouse carry much like MF/Draven due to his %hp w and aoe slow/healing debuff; he's definitely one of the better carries at the moment and he only has a few true adc counters.