Keeping in the punk/hardcore vein, you could give this a try: Rottengraffty - 金色グラフティー. Link is here: m.ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-At_Ln0_BxPQ.html Good song, might be on the traditional side of your musical tastes. Please check it out!
I know this song from their most recent album, which I downloaded after seeing your reaction to "Blah Blah Blah". It is a pretty diverse mix of styles throughout, and never gets boring!
They remind me so much of a UK band called King Prawn. I may have mentioned them before. if you have the time, check out the songs 'The Dominant View', 'Not Your Punk' or 'Racist Copper'.
I got a few bands you might find interesting. Scott Walker + Sunn 0))) Check out their song "Brando". I have a feeling you heard of Sunn 0))) already but Scott Walker used to do pop music in the 60s, now he does really experimental music. Sex Machineguns They're Japanese and their vocals are maybe a little like Deep Purple. Try their song "Tekken II" Alestorm I've heard them called Scottish Pirate Metal. Try their song "Death Throes of the Terrorsquid" Saltatio Mortis A German band with a bit of a classical look. They do some metal stuff but I'm gonna suggest "Früher war alles besser" which is sort of like Pop Punk And just one more Dir en Grey song lol It's called "Vinushka".
The song totaly reminds me off "Let's go to the cemetery" bei Blitzkid. Did you check this band out yet? They're quiet cool, Horror Punk Stuff Something.