IMO:
Champs that "Counter" an assassin are going to be
's ult, and
's ult, and soon to be Tahm Kench because they make an assassin unable to kill their teamates.
Tanks don't counter assassins in LOL because with a little penetration (
or
) a tank can easily die to an assassin in 1 or 2 rotations, and assassins are extremely slippery and mobile in LOL, even without the addition of items like
,
,
, and
.
However, "Countering" doesn't mean "killing". I'm pretty sure the only class of champ that can outright 1v1 and kill an assassin class champ (that has even farm and KDA) is another assassin. There are champs that can easily win a lane against assassins, like
. Heimer can slow the progress of enemy assassins like
,
,
, and
, because he can out farm them, out poke them, and then put them behind enough so that when they jump on him mid-game he can kill them. But even for Heimer, if the enemy
is roaming and picking up kills, or Heimer doesn't pressure enough and Talon gets equal farm, Heimer is going to be in trouble.