An idea for a new champion class (hear me out)

There should be a new champion class in league that would be specifically designed to kill tanks, not to deal a billion damage like assassins, not to right click like adc's or cast a whole burst combo like mages but their abilities would consist of doing damage based on max health primarily.

I know some of you are going to say that there are some champions that kinda fit the profile but I mean those champions have other purposes too, and in this supposed champion class their main goal would be to kill tanks. Not to CC, not to right click, but just to kill them.

Ofcourse when I say this I don't mean that they would one shot a tank or something but would weaken them or something, so some ideas I had were possibly; having that class steal enemy tank stats from them, or use their health advantage as a bonus ratios to their abilities maybe?

Tanks already can counter anything in this game that gives them too much power. This class would make them think twise about their engages, ofcourse there would need to be a balancing consoderation and ways of countering this.

##For those wondering how would they be of any use if any of the champions from that class would be picked in blind pick for example and the enemy team has no tanks, well the enemy team would be punished if they built defensive items, because of that champion class due to (idea: Stat stealing).