Well since Soul Eater, Magi, God of Highschool, Land of the Lustrous, Noragami, and a few others I like have already been said then I'll just say some that haven't been mentioned yet.
Twin Star Exorcists (Give me a Brotherhood remake of the series! Seriously, what made them think that making 70% of the series anime original was a good idea. Just adapt the manga already!)
DanMachi Gaiden: Sword Oratoria (Give me Season 2 or remake the series! Season 1 was absolutely horrible but the volumes it adapted also weren't that good so personally I'd rather they just go straight to adapting the later volumes like volume 5 in season 2 so people can stop saying Lefiya's a terrible character.)
DanMachi Episode 0 (Argonaut) (If they can't remake Sword Oratoria than at least give me the DanMachi prequel damn it!)
Cautious Hero (Give me Season 2)
Hinamatsuri (Also give me Season 2)
KonoSuba (Give me Season 3)
Re:Zero (Also give me Season 3)
Index New Testament (Give me the New Testament adaptation already!)
Fate/Strange Fake (If you aren't going to give FGO an event then you might as well give us the anime instead!)
Pokemon Special (Pokemon Adventures) (I don't even care if its just a short animation or ova just give me some anime content of the manga please)
Archdemon's Dilemma (Fun little wholesome fantasy series I found recently kind of want it to get an anime adaptation. Though considering how much fantasy series have been getting an anime adaptation recently I wouldn't be surprised if it got one in the near future. It does have a voice drama already so it seems quite popular)
Oshi no Ko (Probably won't be adapted until after the Kaguya-sama anime is finished or near finished since the story was confirmed by Aka in an interview to canonically take place many years after Kaguya-sama but I still want it to be adapted)
Sousou no Frieren (Nice fantasy series about life after the demon lord is defeated. Would love to see it adapted at some point)
Magus of the Library (Really nice fantasy series with great art and interesting story. Been wondering if there will ever be an anime adaptation)
Bungou Stray Dogs: Beast (I know Season 4 is coming out but it would be nice for them to reveal more detail about the reality warping book at some point by adapting this AU series)
Species Domain (Fun romcom with fantasy races in the modern world. Would love an adaptation)
Puella Magi Suzumi Magica/Puella Magi Tart Magica/Puella Magi Madoka Magica: Wraith Arc (I still want some of the spinoffs and interquel mangas to be adapted into anime form before the next movie comes out)
Sakamoto Days/Undead Unluck/Mission: Yozakura Family/Mashle/Kaiju No.8 (Some of the 6-7/10 jump series that I have been following. Might as well get them adapted since some moments are pretty damn cool)
The Dragon, the Hero, and the Courier/Reincarnated as a Dragon Hatchling/Welcome to the Impregnable Demon King Castle/Welcome to Japan Ms.Elf/Tensei Kyuuketsuki-san (Some rather niche fantasy series that I like so I want an anime adaptation)