Fugazi
Fugazi formed in Washington, D.C. in 1986 around Ian MacKaye and Guy Picciotto, both veterans of the city's hardcore scene, and became the standard-bearers of Dischord Records' fiercely independent, low-cost ethos. Their post-hardcore sound welded punk aggression to funk and dub rhythms, angular stop-start structures, and dynamic quiet-loud tension across albums like 'Repeater' (1990). The band went on indefinite hiatus in 2003.
Fugazi have named Bad Brains among their influences, and the fellow D.C. band's blazing speed and rhythmic snap underlie Fugazi's coiled, funk-inflected attack.
listen forPlay Bad Brains' 'Pay to Cum' and then 'Suggestion': feel the taut, whip-fast rhythmic control and the abrupt bursts of intensity.
Black Flag sits among Fugazi's cited influences, their grinding, punishing hardcore feeding the heavier undertow of Fugazi's sound.
listen forSet Black Flag's 'Rise Above' next to 'Bad Mouth': listen for the heavy, deliberate churn and a vocal that spits its lines with mounting anger.
Wikipedia notes that Fugazi's heavy riffs drew on popular rock bands such as Led Zeppelin, whose weight and swing surface in the band's biggest, most muscular moments.
listen forPlay Led Zeppelin's 'Immigrant Song' and then 'Repeater': listen for the heavy, riff-driven propulsion and the loose, swinging heft beneath the punk.