there were 3 impresarios/friendly rivals behind the curtains of that early London scene - they were called: The Rabbi (Bernard Rhodes - The Clash), The Tailor (Malcolm McClaren - Sex Pistols), and The Lawyer (Andy Czezowski - The Damned) ... they all got their band, and that trifecta were the Vanguard, no question.
Czezowski knew how hard McClaren & Rhodes were gonna go with the politics (famous story of Rhodes telling Strummer & Mick to NOT write about girls or cars or love), seeing as how they were both so infatuated with the Situationist demonstrations/protests from Paris '68.
so he steered his band more towards concentrating on nihilism solely in the sound scape - saving the burden of social consciousness to the other 2 outfits ... which did kinda ostracize the Damned to a certain extent, but, for my money, they were always a better "punk" outfit than the Clash ... and i believe their debut platter ranks as 2b of all the opening salvos (Ramones at #1, Pistols at #2a) - Rat, Vanian, and Brian James were so unbelievably tight - along with the Captain, as you already mentioned ... these cats were extremely proficient, and powerful and so full of energy ... setting the stage for such high octane acts like Sham & the Jam, who were right on everyone's heels, and just waiting to explode.
they have remained a fascinating follow , and have succeeded in all their iterations - their goff pop turn in the 80s was a right proper BLAST - with "Phantasmagoria" and "The Black Album" both delivering some of the decade's best listening.
- and they never fellated themselves, nor take themselves oh so seriously, like that certain other aforementioned blowhard act from Camden town.