Sooo like yea

Didn't specify what kind/which subject matter, so I'll just recommend Watchmen and Maus off the top in case you haven't read them already.

Some graphic novels I've found personally significant:

Fun Home
I Kill Giants
Blankets

Plus I'm working on one rn so I gotchu

Polar
Punisher Max
Preacher

Sandman

Y: The Last Man

Seconds, it’s by the guy who did Scott Pilgrim

Superman For All Seasons (really pretty art, not crazy comic book-y)

The Underwater Welder (kinda X-Files ish)

King City is a really awesome one. it's goofy and smart like adventure time, but also really adult at the same time.

some flavor pages:

also, everything that brian lee o'malley has made in his career

everything by frank miller

East of West

bone if you haven’t already

ktt2.com/david-choe-slow-jams-scans-69562

Jimmy corrigan: the smartest kid on earth by chris ware

invincible

So none of you motherfuckers gonna say Watchmen or what??? Read Watchmen op, its pretty good.

The Dark Knight Returns

HellBlazer
Swamp Thing

black hole

Dunk & Egg trilogy

Saga.

Flight

iykyk

we had to do assignments on 'maus' at school cant rember if it was good was to busy trying to reach 1500 words

A Contract With God
Watchmen
Spider Man: Torment
Last Knight on Earth
From Hell

wow i don’t think ive ever met anyone else who likes superman for all seasons

asterios polyp

daytripper

saga

sandman

all star superman