Which top/mid ranged champs can carry?

Hey so... I'm wanting to find new mains. I prefer top/mid and typically like champions that have some range, melee/tanks just aren't my thing. However... I'm honestly not sure who is good and who can carry a team.

Would it be a good idea to learn champs that can both top and mid or should I try to learn separate laners....?

Some ideas for champs I've tried and liked are: Irelia, kennen, akali, jayce, teemo, heimer, azir, ahri, and annie, but I'm not sure if they're good or can carry a game.