Questions questions questions! You're the never ending question machine it seems!
Ryan Clark are Ed Repka are probably among my top artists/designers I guess. I tend to like more minimalist artwork if anything, or at least artwork that is more matte and/or less immediately intricate. Spheres, symmetry and space imagery are also favorites for me.
Trenches -
The Tide Will Swallow Us Whole
The Analyst -
Summoning the Wretched
Cloudkicker -
Fade
Cloudkicker -
Hello
August Burns Red -
Messengers
Distances -
Ages
Tesseract -
Altered State
Winters -
...And Bear Witness to the Colossus...
Becoming the Archetype -
Dichotomy
Red Seas Fire -
Exposition
Buried at Sea -
Ghost
Hollow Tongue -
Godsnakes
Lost in Kiev -
Motions
The Famine -
The Raven and the Reaping
The Famine -
The Architects of Guilt
Callisto -
True Nature Unfolds
Demon Hunter -
Storm the Gates of Hell
Hugi -
Solarliod (PS: This album is some super fucking shitty black metal and I regret buying it but god I love the design work, which honestly made me think it wasn't even a black metal band to begin with, lol. Also, I had horrible time even finding good digital artwork when I ripped it so this is actually my scan of it)