Recommend me some 'A' grade anime like attack on titan, code geas, and death note?

I haven't been watching a lot of animme for like the last 4 years cause I got bored of it, but now that I'm watching part 2 of season 3 of attack on titan, it's got me interested to see if there may be some other really good anime out there which I've missed out on. 

So yeah, if you could recommend me some that have a strong solid interesting fast paced plot, with good intriguing characters like those in aot, code geas and death note, that would be awesome. thanks

(no rom-coms)