The berserk movies are always a good watch, you can try devilman see how you like that, gantz and erased

OH okay thank you! I'll look into those!

Hunter x Hunter and Yu Yu Hakusho certainly has its moments as Tegashi loves to push the boundaries of Seinen at times (and feels moreso due to your expectations that it'll be kid-friendly) but other than that I'unno other than stuff like Hellsing O:

hmmm I remember those slightly. never watched them. and oh Hellsing! I've tried to watch it but like on the 3rd ep something goes on in RL that takes me away from watching. weird half baked curse :'D lol MAYBE THATS WHAT i SHOULD DO AND WATCH THE WORLD GO "hey no dont " xD

Usually if i want to watch something dark.. I just play Amnesia or Dark Souls, rather than an anime or movie