Need help picking a champion to "main"

Hey all, So i am a silver 3 scrub that wants to attempt to climb by one tricking all the way to being hard stuck plat 1. I have always enjoyed champions that are able to carry the game by either split pushing or influencing other lanes. currently i mainly play nasus , but i feel like i am going to screw my self over once i get to an elo that knows how to play against him, would appreciate any suggestions on any other champs that would have a similar split pushing aspect.