Mark Holcomb of Periphery: My Five Most Influential Guitarists
Emperor's final album, Prometheus, is maybe my favorite metal album ever, and the guitar work is a main part of it. The album had such an epic, darkly symphonic vibe to it, but the riffs were so incredibly tasty and the arrangements were grandiose but concise enough to not bore you. He walks that fine line of writing dark, dramatic riffs that also happen to be technical and tasteful.
As a black metal player starting out, his trem-picking on that record was frequently used but accented in such unique, melodic ways that I wasn't accustomed to hearing in heavy music. He harnesses that primal feeling that traditional black metal players have, but he refines it with taste, melody and a trained compositional ear.