Has given you an abundance of anime that you can watch to last you a few years. I have watched Black Butler and enjoyed it (I am not a reader of Manga) based on my daughters opinion years ago, the graphics of course are old school in comparison to these days, however the show is still going on... think the latest one just came out last year, haven't watched them yet.
There are a few I could add in, however I was shocked none of them mentioned OverLord, Kinemitsu (spelling) the Demon Hunter or Golden Kamuy... there are others, oh, by the way, the suggestion:
"Reincarnated as a Spider, So what..." isn't that great, you have to have some patience to get over the over acting in it (well comments). Just my personal opinion, to be honest, it could have been done better since the story line is decent enough for a 2nd season or more.
There are others like the 8th son or 7th son, and no one mentioned the 7 deadly sins etc.
But like I stated, you have more than enough to watch and catch up on, note, I don't read Manga, so some of the anime may not be to your liking.