Yeah nah, Harald is one of those tragic characters you can see from a mile away because of the current Elbaf's status as a nation. He was endlessly optimistic despite many warnings especially Rocks's warning and with what happened with him on G** Valley. What would be more interesting to me is if he still survives to this day despite being "officially" dead and is preparing in the shadows to retaliate against the World Goverment. If he doesn't, I'm sure he's left his sons and successor a contingency plan with how to deal with Imu and the World Government.
Shanks the Rat King strikes again. He dipped after a year of espionage and probably after learning about Nika and the Gum-Gum Fruit which he successfully intercepted 2 years later. Bro is who Sanji would've became if he was still given stealth and sabotage scenes by Oda.