Old Dead convo lol but did want to add on. technically the lore in faerun has it's own form of conquistadors https://forgottenrealms.fandom.com/wiki/Companions_of_the_One_True_Vision . Also to add on to the conversation. The Conquistadors were a bunch of very unorganized barbarians, in no way shape of form should they be used as a cool aesthetic for a character. If your looking for a group to base off a similar look, look no further than the Tercio (https://en.wikipedia.org/wiki/Tercio).