Who is the best ad carry right now?

I have been playing League for about 5 months now. I really enjoy playing ad carries. I enjoy watching the ad carries in tournaments, like the recent MLG tournament. During that tournament, Urgot was either picked or banned every match. I understand that, because he seems to be a counter to all the ad carries, especially in laning phase. Anyway, the majority of the ad carries that the pros use seem to be Urgot, Graves, KogMaw, Corki, and every now and then Tristana. I have used all of these, and personally, I think that KogMaw is the best AD carry. I see him as the AD carry with the strongest late game, good poke, and with his W, he can stay relatively safe during a team fight. Every AD carry has a good late game, but KogMaw's seems better, so that is why i see him as the best. Aside from Urgot, I see the other best to be Corki. At level six, Corki has so much poke potential, and he can fight well with his ulti. His W is very good for positoning himself in fights and escaping. He can fight tankier opponents with his Gatling. Other than that, I do not know who could be the best AD carry. I understand that they all play differently depending on the support, or opponent. I just want to know who might be considered the best AD carry ATM and why. I saw recently that a pro said that Graves is. I don't know Graves well enough to understand. Who is your favorite AD carry, and why? Who do you think is the best right now for solo q or in the competetive scene?