The Viktorias might be the best hard counter for the Resurrectionists as a faction, since their main defences are high wounds and Hard to wound, both of which the Viktoria are great dealing with thanks to Mark of Shez'uul and solid damage tracks (min damage 5 with Sisters in fury). With careful timing and placement they can also take out a bunch of newly summoned models with their Whirlwind trigger. Taelor is an essential counter as well with "Welcome to Malifaux!"
Against the typical, summoning-heavy Resser I'd probaly recommend Misaki or Leveticus in addition to the Viktorias. Misaki can dive in and kill the enemy master, halting all summoning and severly crippling the enemy crew, while pretty much everyone in core Leveticus crew can farm Abominations from the usually weakened summons with Desolate Warping. Also, Leveticus' Unmaking attack ignores H2W and H2K, which is a plus against ressers. Resser also tend to be slow and favour close combat, so shooters, like Convict gunslinger, Freikorps trapper and Hans might do well against them. I'm unsure of the usefulness of the rest of his abilities against Ressers, but Von Schills gun ignores Hard to wound as well, so it might be effective, especially if you can get Stand and Shoot to go off.
Against Kirai the Viktorias are still great with Whirlwind and Mark of Shez'uul, althought every other master - apart from Tara and Von Schill - has a Cast attack that can get past Incorporeal. Hans, The Nothing beast and Freikorps Librarian can get past Incorporeal as well.
Against McMourning Johan is your guy, thanks to his condition removal will keep your crew free of poison bombs and general poison harrasment from McMourning's and Sebastians Catalyst and Sebastians Induction, which bumps poison damage from 1 to 3, and his and Relic hammer, which can deal with McMournings Flesh constructs. Hamelin might seem effective as well, since the He and Nix have Nihilism, but flooding the board with rats and stolen almost guarantees McMourning a Flesh Construct per turn thanks to Moonlighting, which he will have. Also, McMourning's Precise ignores most common defences (including all of Freikorps) and his combination of 14 wounds, Hard to Wound and Organ Donor make him incredibly hard to kill with damage alone. Tara and Jack Daw might be the best options to disable him, Tara through burying and and Jack Daw through Paralyzing with Nurses, while Misaki and Leveticus might be best equipped to deal with him for good. Outside master, Killjoy, Alyce and Bishop's haymaker might be useful against the good doctor, as well as (heavily theorizing here) The Nothing beast, as the Ca 7 on it's attack easily tops McMourning's Wp of 5, Precise doesn't get past Incorporeal, if you can empty your hand it's Df 9 can easily top his Ml 6 and with Voided set up you can retaliate for every Ml attack he hits with. (Damnit, now I wan't to try Tara and the NB against McMourning, I'll report here as soon as it happens)
This is mostly just theoryfauxing based on the books, but based 2 years of experience almost exclusively against Ressers. Still, take it with a bit of salt.