Who should I play....?

Well if you wanna get freelo, just go Irelia, but you get no respect for doing that, so i woudn't recommend it. If you want a high skillcap top laner that is very rewarding if mastered, pick Gangplank. He's just as hard, maybe a little harder than rumble, but is more powerful if mastered. Shen is also a really good pick in general. He's most effective against tanky toplaners due to his percent health dmg on his q, but can also duel toe to toe with squishier ones too. Shen will carry you all the way to diamond and maybe even challenger if you so choose. Darius is really good at stomping lower elos since no one there knows how to play against him, but he doesn't do as well in higher elos. I've heard really good things about kennen as well, but i don't know a whole lot about him. If you have any more questions, just message me in game.