Trundle
I feel like Trundle needs some toning down. I am by no means a pro, and you do not have to agree with my opinion at all about Trundle, but I'm just asking that you can read and listen to the end of this. He has ridiculous scalings, and sometimes his pillar can really impact a teamfight, excluding the fact that he can use it more than once in a teamfight while someone who has a similar mechanic Anivia, has a fixed cooldown at 25 seconds unless you buy cdr.
Many of the items also make up for Trundle's weaknesses. Titanic Hydra fixes his waveclear problems and also helps with trading/dueling, so it outclasses botrk in almost every case and he stacks a lot of HP, so it does more damage. The active also helps him 1v1 and gives him some burst, something he lacked. Dead man's just helps him get in range and stick on a target, which is what he was lacking in the first place.
I am aware that Titanic is getting nerfed, but I think that Trundle needs to take a hit. He's still this strong with the nerfs that already hit him.