By the way, I'm almost convinced Bolt Thrower is my favourite death metal band. Which is yours, guys?
Excellent question. Devourment (Crucify the Impure, Fuck Her Head Off) have probably been getting more play time than any other DM band over the past few months. But can't go a week without throwing on some Heinous Killings (Beating Her to Deformity, Skinned Alive in Acid). Joe Wolfe is arguably the finest abstract vocalist in the genre.
I think if I had to pick a single favourite, it has to be Deicide (Dead But Dreaming/When Satan Rules His World/Dead by Dawn). They've put out a ton of garbage over the years, but they somehow maintain relevance on the strength of their first four albums. Plus they've been incredible every time I've seen them live.