Bolded titles are my top recs. Series listed in chronological order of my seeing them:

Steins;Gate (correction: episode 8 unfortunately has >!Okarin!< grope >!Luka!< because he doesn't believe that they're actually >!a girl in this worldline!<. Everyone rightfully calls him out for being a creepass)

Castlevania (shut up yes it is)

Vivy: Fluorite Eyes Song

Violet Evergarden (edit: NOT THE MOVIE)

Hyouka (skip the ova)

Belle

A Silent Voice

Baccano

Deca-dence

Trigun

Akudama Drive

ACCA: 13 Territory Inspection Dept.

Fullmetal Alchemist

Fullmetal Alchemist: Brotherhood

Spy Family

#Mushishi

5 Centimeters Per Second

Afro Samurai

Your Lie In April

Nichijou

Odd Taxi

Cowboy Bebop

Canaan

Sk8 the Infinity (arguably I guess because Adam is a creepass)

Supercrooks

Bocchi the Rock

House of Five Leaves

Weathering With You

#Haibane Renmei

Samurai Flamenco

BNA

Redline

#Planetes

Last Exile

Witch Hunter Robin

Noir

Wolf's Rain

Boogiepop Phantom

Boogiepop And Others

Ghost In The Shell (all timelines)

Niea_7

Serial Experiments Lain

Megalo Box

Bakumatsu Kikansetsu Irohanihoheto

Thus concludes the exhaustive list of animes I've watched where I didn't have to put up with any sexualization of minors

Now try and find that but not somehow linked to high school.

Snow White with the Red Hair is my favorite hidden gem.

• main character is a strong, independent, brilliant woman. She isn't abrasive or obnoxious, just confident in who she is. Her success in the story is entirely from her own efforts.
• love interest is a well rounded character, not an Everyman stand in. His own strengths and weaknesses are plot relevant and he grows independently of the mc.
• the romance progresses at a steady pace and isn't a will they/won't they for two seasons.
• romance is one of many plot lines, not the only one. It's also slice of life and medieval politics.
• and of course, everyone's adults. Everyone has normal body proportions and healthy personalities.

Tbh, this is why I don't tell people I like anime.

OP you just wanted anime suggestions by creating this post didn’t you?

(Me too that’s why I saved this post hehe)

Gonna go through my mal and find all the ones I've seen. "?" means I'm not 100% sure:

• 5 cm/s
• place further than the universe
• a silent voice
• aldanoah zero?
• Another?
• AOT
• baby steps?
• blood blockade battlefront?
• bocchi the rock
• carole and tuesday
• death parade
• deca-dence
• erased
• fmab
• golden time
• grave of the fireflies
• great pretender
• haikyu
• Howl's moving castle
• I can't understand what my husband is saying
• i want to eat your pancreas?
• japan sinks 2020
• jojo (except one episode)
• jujutsu kaisen? (Only seen first season)
• k-on?
• kaiji
• keep your hands off eizouken
• kingdom
• kuroko's basketball
• link click
• made in abyss? (Haven't seen the latest season)
• magi?
• 3-gatsu no lion
• megalo box
• mob psycho 100
• nichijou
• odd taxi
• patema inverted?
• ping pong the animation
• psycho pass
• ranking of kings
• revenger?
• sk8 the infinity
• spirited away
• spy x fam
• star wars visions?
• steins gate?
• the boy and the beast?
• saiki?
• promised neverland (just watch s1 and pretend that's the end of the story. Never watch s2)
• the way of the househusband
• tonikawa?
• tsuredure children?
• vinland saga
• violet evergarden
• vivy
• weathering with you
• wolf children
• Wotakoi
• yona of the dawn
• your lie in april?
• your name
• yowamushi pedal? (only seen the first few seasons)

- *Steins;Gate*

- Death Note

- Eve no jikan (short TV series/movie)

- Yuru Camp△+Heya Camp△

- Hunter x Hunter

- Hunter x Hunter (2011)

- Koe no Katachi (movie)

- Tamako Market+Tamako Love Story

- Yuu☆Yuu☆Hakusho

- Hibike! Euphonium

- Shelter

- Tsurezure Children (/Tzuredure Children)

- Usagi Drop (anime only - don't read the manga)

- Yuuki Yuuna wa Yuusha de Aru

- Akagami no Shirayuki-hime

- Cardcaptor Sakura

- Flying Witch

- Ima, Soko ni Iru Boku

- Odd Taxi

- Tsuki ga Kirei

- Violet Evergarden

- Amagi Brilliant Park

- Baccano!

- Barakamon

- Cat Shit One

- Death Parade+Death Billiards

- Horimiya+Hori-san to Miyamura-kun

- Hotarubi no Mori e (movie)

- Kimi no Suizou wo Tabetai (movie)

- Plastic Memories

- Tonikaku Kawaii

- Hitoribocchi no Marumaru Seikatsu

- Hoshi no Koe

- Pale Cocoon

Here's some genre keywords for a start:

Adult Cast

Seinen/Josei

Chances are if those shows involve underage sexualization/unhealthy relationships, it doesn't endorse them.

Edit: Also look for anime with kids as target audiences, they should have none of those things. On further introspection, that sums up to "look for shows that ain't shounen or shoujo" lol.

And if you want some fan service that fits these requirements and is still wholesome I give you Goldenboy.

There’s like hundreds of good anime that fit the description (as other comments highlight), you’re just looking in the wrong places if you agree with this meme.

You’re obviously going to find sexualization of teenagers in most series aimed at teenagers.

Okay, now provide the reverse list.

Holy shit there actually ARE SOME!?!

Monoga-

So.... every hentai?

Why am I not seeing One Piece in here? It sexualizes nami and Robin but they are both over 18. There aren't really relationships at all in the show unless you count boa hancock but that's pretty tame and not a relationship

Link click