If not can we make one here? It'd help a lot of people who ask "What anime should I watch if I like this?"
Anime-Planet have this really nice list. The list contain all genre on their database. They have it on alphabetic order or number of likes order. If you want to find popular genre you can sort it by likes count. If you click on the genre you will find all anime with that genre. You can sort it by name or rating.
I usually go here to find new anime to watch, the genres are not sort able but it has a lot of themes to select other than just genre and it helps a lot when you want to find something you like, it also has a button in every anime page to search based on that anime's information.