Alistar

Amumu

Anivia

Annie

Aphelios

Azir

If only Azir's Soldiers can intercept the Scattershots of Graves' passive, he'd truly be an extreme Threat to Graves

Blitzcrank

Brand

Braum

Caitlyn

Camille

Cassiopeia

Corki

Diana

Ekko

Elise

Evelynn

If Graves missed being charmed, :)

Fiddlesticks

Galio

Who said Just because Galio's supposedly the most Magic Resistant he shouldn't build Armor & still deal tons of DMG?

Gangplank

Gragas

Gwen

Hecarim

Heimerdinger

Illaoi

Illaoi's Tentacles may obstruct Grave's pellets

Irelia

Ivern

Janna

Jax

Jhin

Karma

Kassadin

Kayn

Kennen

Kindred

Kled

Kog'Maw

Lee Sin

Leona

Lillia

Lissandra

Lulu

Malphite

Malzahar

Maokai

Ganking a Maokai's much hassle than a Janna support, because he's more oppressive & were a lane bully.

Nami

Nasus

Besides keeping distance, be wary of Nasus' Wither

Nautilus

Neeko

A Good Neeko knows how to keep distance besides juking with her Passive & Clone

Nocturne

You may want Edge of the Night against Nocturne's Ult

Nunu & Willump

Olaf

Orianna

Ornn

Lore Wise, Ornn can either bless or completely ruin Graves' favored weapon ingame, he's much chunkier & have more pressure than Malphite simply having insane amount of Armor while shielded.

Pantheon

I don't meant to expose fellow Atreus Mains, but if Atreus leap, before fully upclosing be sure to dash away so he can't immediately follow up 3 attacks. But he's more straight forward than Graves & can easily Emp Shield Vault again.

Poppy

Quinn

You can dodge her Nearsight but you can bait her into your Smoke screen.

Rakan

A Good Rakan's supposed to be an extreme threat especially with fellow reliable team, annoying to go against but if you just managed to dodge his meh charm-int, shot gun that smug

Rammus

Rek'Sai

Rell

Renata Glasc

Renekton

Rengar

Can easily evade Smoke Screen, can resist your Burst, you may especially want Stealth Ward instead of Oracle Lens to be able to aim him from bushes.

Riven

You'd only be very wary against Riven with Prowler's Claw, if they're normie with Gore Drinker, have fun baiting her into the Smoke screen still be wary it's teamplay after all. You may also want Serpent's Fang after Chemtech Chainsword against her.

Rumble

Ryze

Sejuani

just dodge her skill shots

Senna

Can outrange you, especially those who have Lethal Tempo, if you try to gap close you may be snared instead or even if before you do she can surround herself being untargetable to Basic Attacks that either you or other should go upclose against her

Sett

Shaco

Shaco's squishy but simply annoying, be wary of his jackboxes

Shen

Singed

Sion

A good Sion can knows when he can knock you up.

Sivir

Skarner

Swain

Sylas

Syndra

Tahm Kench

Taliyah

Talon

Just as straight forward as Atreus Pantheon

Teemo

His Blind can literally distort where would Graves aim, his shrooms can also intercept your shotgun pellets.

Thresh

Tristana

Trundle

Also straight forward, can even steal your stacked Armor

Tryndamere

Twisted Fate

Twitch

Urgot

Varus

Be wary of his skill shots

Vel'Koz

Vex

Vi

Viego

Just stay away from his reach

Viktor

Vladimir

Volibear

Volibear with Randuin's Omen & or Prowler's Claw can counter the **** of you

Warwick

Wukong

Xayah

Xerath

Xin Zhao

Yorick

It would be tricky to base attack his Ghouls while they're leaping midair

Yuumi

Zac

Ziggs

Zilean

Zoe

Zyra