haha, been using GP4 (specifically 4 !) for the past 11 years. I write all my stuff on there. Why, what tab do you want me to check out ?
I've got to disagree with you about Legion, I think it sounds like a bunch of very angry teens pretending to be all evil and Satanic, and though there is some substance, the overall product is highly uninteresting. I like Deicide on Once Upon and Serpents. Although I'm a Christian lol, the music is pretty good, and the lyrics very well written, surprisingly well in fact, to the point I thought it was dubious Benton wrote them. "I am No One" does raise some questions.
You seem to enjoy highly percussive death metal. The Hate Eternal vid you posted, Ulcerate...
I think the best death metal material isn't from a specific era. I think the best death metal is Cannibal Corpse (late 90's and forth), Decapitated (first 4), Suffocation (mid-90's and forth) and Morbid Angel.
I think Suffocation's best was 'Pierced', and the eponymous track is the best I've ever heard from them. BRUUUUUUUUU-TAL, goddamn.
Ulcerate is pretty good. But they're too rhythm-oriented imo. Don't get me wrong, I'm a rhythm guy to the bone, but I like my death metal crunchy and riffy, single-note attack-laden riffing, and more definition in the texture. This is highly homogenous, and very relevant musically, but too flat for me. They'll use a ton of dissonance and odd chords, some broken time signatures I see, and a ton of blasts.
Different but similar are The Amenta. These industrial boys from Down Undah offer more order in the song-writing and give more direction and pace control than Ulcerate, but still highly percussive, although very different of course, I'm not comparing quality. They've got choruses and everything, check it: