Mickle: a *lot* of 'female pirates' to chose from: Black Cat Bases link Black Scorpions link Bronze Age link Eureka of course picture Old Glory link Reaper link
. Enigma 'Katerin' could also fit the bill specially well link as maybe could the female among the Warmachine 'Arcame Tempest Gun Mages' link
. Those not chosen for 'Mickle' could become part of the 'roused rabble'.
Black Scorpion has male officers in the Pirate range, some rather gaudy.
Dwarf pirates in tricorns? A *lot* of Orcs, but dwarves? Maybe in some Fantasy range, and anyway *headswapping* giving a tricorne would 'tag' it "18th C." -reapair / complete the mutilated beard with greenstuff? Anyway most 'dwarf' minis are caricatural / cartoonesque, probably more 'realistic' to convert / give a 18th c. 'look' to a stout, fat 20-23mm mini?
Mob? Many minis from the various West Wing 'Gothic Horror' could be suitable link ; id° for various Blue Moon sets link A number among the (almost countless) male pirates link can be included.
Search also for 'armed civilians' in FIW (e.g. link ) and AWI ranges.
Somewhere (?) a small 'characters from Gevaudan' (± aka 'Brotherhood of the Wolf' characters) range.
Of course Foundry 'offers' (!!) several 18th C. potentially useful sets of civilians, smugglers, highway men.. ; Front Ranks has a few link ; ckek also Outpost Highwaymen range link
Maddened crowd can additionally pick from suitable minis from some Revolutionary & Napoleonic ranges (French Revolution, Anti Napoleonic Spain and -Eureka- Tyrol
)
Reaper link have rather generic 'civilian types' including children.
(Btw, to adapt stories set in later times to the 18th C. would require the same kind of 'cast' and a few conversions of figurines: I'm currently toying with ideas about the adaptation of Japansese Hellsing to the 'tricornes' period ( link ) as Hoellesingen: link
)