I literally don't even remember you discussing about Cloud being logical Final Fantasy pick during mash 4 hype however I do remember that you were pushing Dragon Quest's Slime as one of third party representative and the representative of Dragon Quest.
I think the thing about Slime is that it absolutely is the most popular character in the series in terms of sheer recognizability. Moreso than any particular MC, even Erdrick. It's not quite a situation similar to Cloud vs Chocobo in my reckoning.
I see Erdrick getting in first however, simply because the character represents the mechanics of the series as a whole better than Slime would. Even if I would prefer the latter since my only engagement with the series is DQM.