French Classics and Modern Lit? (*not* in translation)

Hi, I have a background in English Literature and I feel like I have a pretty solid grasp of the English Canon and what kinds of things I like from English Lit (early C20th English, mid-late C20th American, mid C19th English, etc.), and in translation I also like a lot of the C19th and C20th Russian/Soviet works, and I'm starting to read more English lit from 1980s onwards after many years of being slightly snobby about it.

I am fluent in French (I work/speak in French 50% of the time at work, so I mean this as genuinely fluent and maybe approaching bilingual (without the arrogance of calling myself bilingual), not "English person fluent"), but I have never really tried to read much in French beyond La Peste and Bonjour Tristesse (which I read many moons ago as a teenager) despite being big on reading.

What are the classics of the French canon that I should look at? Hopefully the English Lit preferences may help steer towards certain recommendations? Additionally if there's any modern French books that have been published in the last 30 years that you loved I'd love to engage more with contemporary lit too (I'm imagining like The Virgin Suicides or The God of Small Things as my anglophone equivalents)

Thanks in advance!