“Another” left quite an impression on me. Supernatural Suspense Horror and I haven’t seen anyone else mention it yet.
Angel Beats is one of my all-time favorites.
Dan Da Dan is an obvious recent pick. Your Name is amazing if you haven’t seen it.
If we want to get into more Shonen offerings there’s Chainsaw Man, Tokyo Ghoul, Jujutsu Kaizen, and others.
This is a tough one. If I was recommending anime to someone brand new to anime then there are a few guidelines I’d follow:
To that end I usually start people with Your Name. It’s movie length so easily digestible. The animation is beautiful. The plot is relatively unique while still being easy to understand. And pretty much anyone can enjoy the mix of slice-of-life and supernatural.
I’ve also had a lot of success with Ouran High School Host Club. Everyone can understand the concept of a school but then the inclusion of the wacky rich people makes it a fun time. Another school slice-of-life could work here too like Toradora or Azumanga Daioh.
Finally, back in the day I got a lot of people into anime with Beck. It’s still pretty good even by today’s standards but another anime about music or a band would also work since people tend to understand music or band dynamics in general. Possibilities include K-On or Your Lie in April.
Anyway, just my thoughts.