: No real counters, but also no particularly good matchups. She can work well vs assassins because she can charm them and ult away, but at the same time if she gets caught without one of those abilities up (both if the assassin has his ult up), she's typically gonna die.
: Range, AoE. Yorick really gets crushed by kiting, and anyone who can quickly kill his Mistwalkers can deal with him in lane really easily. However, almost nobody can match him when he split pushes, and his ability to split push 2 lanes at once solo (by dropping the Maiden in one lane and then going to another) makes his split push power completely unmatched. Keeping the Maiden for your own use in case someone comes, on the other hand, allows you to be completely impossible for a single person to kill you solo. As long as you didn't lose lane, you won.
: The burst god. Anyone with a blink will be tough because of how hard it is to land the stun on them. Plus, most mid laners with blinks are assassins, who can kill him if they dodge the stun.
: Too new to say yet, but I would guess that lane bullies ruin her, seeing as how weak she is until she gets late game.
: Again, lane bullies. She's a late game hypercarry, but her early game, while strong among hypercarries, is weak vs someone who can deal with her.
: CC and kiting. That's about it. He can duel most champions 1v1 because of his insane innate healing, and hell I've even soloed dragon with him at level 4 without using Smite at all, but he's not very good in teamfights as there are more things that can deal with him. A good stun can lead into a chain of cc that stops him from killing anyone while they whittle him down. Avoid picking him into teams that can do this, or if you do, focus on split pushing over teamfighting in the mid and late games.
: Not sure where you're picking him, but he's worst against ranged, poke-heavy champions, as they can whittle him down. In support, that's things like Karma, Brand, and Zyra. In top, that's things like Vladimir, Kennen, and Teemo. He's also bad against champions who have a stronger all-in than him in the top lane, so things like Riven or Camille would also be bad matchups. As a support, however, his ADC can usually cover that weakness.
: Kled has a disproportionately high win-rate for his pick rate in top lane, and may actually be overpowered. He's weakest against people who can disengage and stop him from killing them early, but equally weak against people who can beat him in the all-in. There aren't many who can, but you should be very scared when faced with a good Riven or Fiora, as you don't have the ability to duel them if they're good.