Ok since we are defining tanks in completely different ways I will be more precise.
Please identify a melee champ that scales off of AD that can effectively counter Darius.
teemo, kayle, i think yorick, and elise are some oddballs that do well against him and happen to do a bit better against ganks.
AD tanks don't do so well though AD bruiser shen or leona can probably lane well against him.
If you want to counter him throughout the entire game, possibly on a larger scope than necessary, volibear can do this. Anybody with peels such as chogath or singed or vi could do this.
If you want to beat him down with brute force there's vi, jayce, vayne with IE, somewhat farmed nasus, and earlygame fiora
If you want to outduel him with ease there's irelia, shaco, kayle, sion, counterbruiserbruiserlux, nocturne or really anybody with a denial to his ult, earlygame vayne, olaf, jax, and zed.
If you want to outfarm, harrass, zone, control lane, and gank harder than him everytime you gain even the slightest upperhand even if you arent necessarily going to directly counter him there's jax, vi, olaf, riven, irelia, katarina, talon, lee sin, and some others.
If you arent laning against him but you want to counter him later on or want to switch lanes to help somebody out so you can annoy the **** out of him early and **** on him late there's talon, pantheon, kayle again, teemo again, jayce, and others with blinds peels, stuns or whatever.
I'm sure there's more ways to look at it but he is not limited to the 5-10 counters most people list.
If you don't like to think and just want to limit yourself to easy inlane victories that may or may not be able to counteract the rest of his team disallowing any form of comeback from him or anyone else there's
kayle, teemo, garen, nidalee, and cait who don't have reliable CC
Theirs vlad, tryn, rumble and some others who may or may not be needed in your teamcomp which can weaken it if chosen just to counter darius and not their whole teamcomp.
Not to say these are bad picks, just dont screw yourself trying to counter darius. In the long run he is rarely the biggest issue you will face even though he will appear to be the one that's killing you and your team off.