Just listening to The Project Hate and thinking about whether or not bands like Entombed have been covered a lot. I mean, they've been quite influential in the early 90s wave of Scandinavian death metal, which incidently is pretty underground. You'd expect quite a few bands paying homage to them. A quick search at Encyclopaedia Metallum gave a limited return of Entombed covers:
Aborted - Drowned (The Haematobic EP)
Suicidal Winds - Supposed To Rot (split single with Bestial Mockery)
EvilStorm - Left Hand Path (live track on EvilStorm 1999)
Delve - Revel In Flesh (Sentenced By The Unknown demo)
Repugnant - Carnal Leftovers (Premature Burial EP)
End It - Out of Hand (Meet Your Maker)
Haemorrhage - Premature Autopsy (Loathesongs cover EP)

Absolutely underground! Think I've only heard of Haemorrhage and Aborted before. Would this be another stuck in the middle band? Sure looks like it. Whereas Black Sabbath, Metallica, Kiss, Motorhead, AC/DC and Venom are big enough to be idolised and Bathory and the Misfits cult enough to be associated with, Entombed is another important band within the genre, but not quite out of reach enough. Or maybe their move to metal'n'roll has scared off the death metal underground.