Which ADC is most similar to an assassin?

I main mid lane Katarina , Talon , Yasuo , Akali

I was thinking on learning a different lane and learn ADC. Which ADC will be the easiest to learn judging by my play style? I like assassins because of they way the burst down people really fast. I used to main Annie , so playing ranged champions should not be a problem. My thoughts were on Draven , is he a good ADC? High ban/pick rate? Vayne seems to be picked or often banned. I was also thinking of Twitch , but he seems to be hard to play. I want a ADC champion that can carry in solo/duo queue, I'm also willingly to put some time to master this champion.

Thanks :)