Wukong, Nocturne or Olaf

I was thinking what to buy, i want a bruiser that can go aggresive and has late game and has atleast mobility, nocturne, i tried him two times in one for all, im great at him. I played wukong few times too, one where hes free, vs maokai, i was doing good until i afk. The other is an one for all game, against lux, was doing good and fine, i havent tried olaf yet though. If the explanation wasnt clear, this is the kind of champs i play and liked, left is better, xin, renekton, j4, pantheon, garen, darius