There are cEDH decks that use pirate commanders but few other pirates, like most of the decks helmed by Malcolm, Keen-Eyed Navigator
I like it because it actually has a fights matter theme, giving you cards when you fight or when your creatures are blocked
This certainly isn't the most exciting monarch effect since it only gives you the crown at the cost of a land, while basically every other monarch card gives you a creature at least, but it gets the job done and a land is fairly unobtrusive
that player shuffles their hand and library together, and draws a new hand of seven cards
Krenko, Mob Boss, Zada, Hedron Grinder, and a few others on this list are very popular commanders online, as goblins is one of the best supported types in all of MTG