As impressive and confident as I may seem in presenting and explaining this list, the truth is that I've only given several of them a cursory glance, so I don't have complete knowledge of the content quality of many of them. Some readers may not like the writing style, the content, the type of characters, how the plot itself unfolds, or some other element of the story.
In addition to that, there's also the fact that some of these anime have spin-offs after their conclusion, such as Akame Ga Kill, Fairy Tail, or My Hero Academia. To be honest, most of these fanfics will only cover the main series without delving into the sequel or prequel, so if you're expecting a story that encompasses everything, you'd better lower your expectations.
But anyway, everyone has their own tastes and interests, and I'm keeping my promise here, so I can only hope that's enough for you.