Hmm, it's a little difficult as I have a different attitude towards finished ones and ongoing reads, so I'll probably divide them :)
the ongoing list:
- One Piece
- Sakamoto Days
- Spy x Family
- Yomi no Tsugai
- One Punch Man
- Chainsaw Man
- Edens Zero
the completed list:
- Fullmetal Alchemist
- Eyeshield21 (it even gave me my nickname on this site)
- Bleach (yeah, I hated the last arc, but the overall emotional impact is too great)
- Naruto (same as Bleach)
- Bakuman
- Death Note
- Great Teacher Onizuka
- Shaman King (this anime got me into anime/manga! if not for SK, I wouldn't read any of it, lol)
- Re:Life
- Dr. Stone
there are more I've enjoyed but which didn't make it to the list, like Chihayafuru, Fairy Tail, Silver Spoon, Beelzebub, Mirai Nikki and so on, so I'll add them as honourable mentions.