In terms of living, it would probably be Aladdin since it was stated that he's stronger than Solomon now, but considering all of the characters, it would probably be Sinbad or David.
I agree!! but i also have a feeling ( i'm reading the manga, i'm right now on manga 24 please no spoilers ^^"" ) that Yunan has quite some power, idk he seems very secretive so there must be something going on
I mean solomon was implied to be a higher god by sinbad at one point but he might've just been grouping him and the higher gods together in the sentence