What are good Anti-tank champs?

Mixed damage, %HP damage, consistent damage in fights, no ability down time, tanky herself to outlast them, high chase with a mallet/red/rylais(ew)/chilling/exhaust. She destroys tanks.

is the anti tank

Any ADC with Ar pen late game

trundle for teamfight. shen for dueling. urgod and wu are pretty good laning against them.

High DPS champions. So for example.

Any ADC Marksman late game. Vayne stands out though.

another good champ to vs tanks that is a tank himself but does massive damage based on targets maximum hp as magic damage ( not many build alot of MR ) is

There are others as well but these I feel are kind of the better ones. Well...some of these might not be "Amazing" anti-tank champions, but I guess it really depends on who the tank is.

are two that I haven't seen yet

also, teemo is a good pick into most tanks toplane, due to early harass and them not having tank stats yet.

and basically anyone who can jg and build botrk and bloodrazor together. They can be alright with it.

Any specific position?

Champs that deal true damage. Or you can just build BoRK and youre instantly a tank buster.

= % health true damage like Vayne, and has an ability to punish hard CC. = both build , have abilities that shred armor, and have a bursty true damage ult, with Garen's being conditional. = ignores 40% armor of all tanks, has passive that deals true damage, is a late game team fight monster, and has the oranges to remove hard CC. = has true damage in his E, builds in top lane generally, has an ult that says fuck you to all the tank's hard cc and dive the backline. = his ult steals 40% armor and mr making tanks squishy for his team to delete.

And plenty more. But really, as long as you build you can kill any tank generally.