Seven Deadly Sins
=Wrath
=Gluttony
I'm sure this isnt by chance. Seeing how Tahm respects Aatrox. But he isn't a Darkin. Looks like Riot will reveal the rest.....sometime
=Wrath
=Gluttony
I'm sure this isnt by chance. Seeing how Tahm respects Aatrox. But he isn't a Darkin. Looks like Riot will reveal the rest.....sometime
Worst sin of them all.

Seven dead
s.
= Lust
But I mean... ALL champions can be greed when they go in for that kill under the turret and end up dying. ;)
Aatrox doesn't really strike me as a personificatin of wrath.
Sure Aatrox is the cause for Tryndameres wrath,but thats about it.If anything aatrox represents war,not wrath.
Someone once posted a theory that since Tahm kench is literally a demon,that there might be 6 other demons who represent the other sins.
&
(or at least swains bird Beatrice) are also called demons,though we can't be sure if they are literally demons,if they are,then they would represent 2 of the other sins.
Shaco could be Lust(because sadism is a form of lust and shaco seems to care only about killing and hurting others),while Swain/beatrice could be either Greed(he took control of a whole nation and seems to be eager to expand his territory),Envy/pride(maybe he wants power,because he doesn't want to be seen as inferior?) or Sloth(Lets face it,swain lets others do the dirty work for him and if Beatrice is the real demon,she might be too lazy do the fighting herself,thus relying on swain)
We still don't know much about Darkins. From the facts, Aatrox is a sword and his body is demonlike to inspire fear in his enemies and have a good battle appearance. Tahm Kench is a devourer who lures his victims with his forked tongue, the aspect of a catfish might be just pure conveniance too.
In the Q/A they said Tahm embodies vice, but they aren't directly referencing the seven from early christianity. If I remember correctly, they go for more eastern influences.