Are you just wanting general recommendations or recommendations that are as MGTOW as possible? I'm having trouble thinking of anything that fits into the later category. Almost every anime I can think of has a love interest of some sort, some harem stuff, etc.

While it would be nice having entertainment that didn't have romantic plot tumors or dodgy love triangles, etc. In much the same way I can read and watch science fiction and fantasy stuff without 'believing' it. I can watch stuff with annoying female characters, provided they don't go overboard with it.

I actually asked a question like this myself previously for books, TV shows and movies and there wasn't a lot there. I thought for sure books would have given me something.