Disclaimer: I’ve only watched like 10-20 so I can’t exactly say it’s the best of all animes

1. Steins Gate

2. Spy x Family

3. Death Note

4. Code Geass

I don’t think I really watch enough to fill out all “top 5”

Honorable mentions:

• The Promised Neverland (S1 ONLY)
• Detective Conan - Was nostalgic for me, I remember watching it in the Mandarin dub, I loved to like pretend to be a detective as a kid, now its kinda… eh
• Re Zero: Great premise… then story got boring and the special ability of the MC gets used less, and the story became much less fun… don’t think I even cared to finish s3

I get very picky about watching stuff, so if the premise reads slightly boring, I don’t watch it. Which is precisely why I only have about a dozen or so Animes watched.