on top:
Tokyo Ghoul
Youjo Senki
also great:
Hunter x Hunter 2011
Kaifuku Jutsushi no Yarinaoshi
Mob Psycho 100
I was in the same situation as you are, Monster brought me back to the road
I flipped through all the manga and there are some little differences until around episode 30 and then you need to read pretty much everything until the end of the regular manga. haven't read re: yet so I don't know what you should read there. I recommend to also flip through all the manga because there are a few sence you probably don't want to miss (there should be 1 or 2 until around episode 30)
it's not a masterpiece but it's very enjoyable to me. for most of the people it's not enjoyable because everyone has his own taste and you may enjoy watching anime most of the people think is shit or dislike anime that most of the people find enjoyable. for me it's "made in abyss", "dororo" and "wonder egg priority". their rating are pretty high but I got board watching. you probably have some too
anime:
Black Lagoon