I always thought of HPD as an Angel of vengeance. funnily enough when thinking about Boba Fett, HPD and Preacher of Pale Rider were the characters that popped into my head too.
That probably helped Boba Fetts coolness, he managed to tap the mythic archetype of silent gunman. He's also the neutral both the outsider - neither Rebel or Empire - and the badass normal (no jedi powers, no Wookie companion) of Star Wars
I'm pretty sure 99.9999999% of Star Wars characters have no Jedi powers or Wookie companions.
And "silent gunman" is far too modern to be mythic.
Nah. He taps into something far older than Cowboys and Jedi. The mask is Dick Turpin or older.