How does Long John Silver compare to latter-day popular pirates like Captain Jack Sparrow or squid-faced Davy Jones?

Silver is your classic fictional Pirate. He doesn't have the quirkiness or modern whimsical persona of our modern day Disney pirates like Sparrow. He exists on that time homered archetype of rum drinking, unhygienic, devious swashbuckler who has that classic charismatic charm that both reviles and interests.