There you go, you spent 3 minutes making your list, and I wasted roughly an hour listening to it and rating it.
most of your complaints were regarding the vocals - but that's just how black metal singers do it, and it's definitely an acquired taste. i'm glad you liked some of it though
This would be one of my favorite songs, though its probably mainstream meh I don't care, I enjoy it.
http://www.youtube.com/watch?v=2oi-8xl7uZs
never heard of the band or the song, or anything like it really, 7/10
i can't think of any electronic/death metal to recommend but some good melodeath acts are Amon Amarth, Scar Symmetry, Dark Tranquillity, Arch Enemy, In Flames (early stuff), and Insomnium (you've probably heard of most)
also a good symphonic/death metal band that is usually overlooked is Haggard. next time you have another hour to kill check some of them out