No Game No Life is a gorgeous game-centered Isekai with lush worldbuilding and an interesting story. It also brings the worst of ecchi objectification/sexualization and the Smartest Man In The Room genre.
Isekai Izakaya
A cozy food anime that centers on the unique joys and experience that only a small establishment can bring. If you've ever worked in or been a regular customer of a small restaurant, you'll enjoy this.
Konosuba! The Legend of Crimson
The Konosuba Movie is the series at its absolute best. From start to finish, the comedy is perfectly on point.
Re:Zero – Memory Snow
For an OVA this is surprisingly well done...a good, funny time worth watching if you liked Re:Zero. Plus, there's a Konosuba Easter Egg!
Re:ZERO -Starting Life in Another World-
Combine your average Isekai fun with the dread of Majora’s Mask and the psychological rattling of Doki Doki Literature Club.
How Not to Summon a Demon Lord
If you don’t want to admit to yourself that you really just want to watch hentai, go ahead and watch this. Otherwise, your eyes are going to be doing 300 RPM in your sockets, both for rolling because it’s so dumb and for checking to make sure nobody sees you watching this trash.
Overlord (Seasons 1-3)
A fun and good watch but a bit lacking in direction.
Saga of Tanya the Evil: The Movie
Everything good from the series and then some. Better pacing, better action, more of the introspection and question asking.
Saga of Tanya the Evil (Youjo Senki)
Stellar military piece with fascinating philosophical aspects. Makes you inspect your stance on national policy, patriotism, war, social Darwinism, and capitalism.
Sword Art Online (Season 1)
A fantastically immersive love-letter to MMORPGs backed with strong emotion that makes a great Gateway Anime. Then it goes sideways for the second arc before picking up the pieces for its second season.