Paul as Davidic parallel?

Yeah, I know - that's what I was thinking:  what the what??
But if we look at the sequence of events and dynamics surrounding the rise of both - maybe there is a nugget of some Truth to buy into.
In the search for the king - Samuel brought before the people the biggest, most valiant, strongest, charismatic candidate he could find - Saul.  and we can read God's endorsement as if to say, "well, okay - if that's what you want to do, let's follow this path for a while and see where this leads." And then God chose David, who was, for as much as we want to romanticize him into the perfection of 'godliness' (whatever that means) - he was a scrawny, punk of a youngest child - he was a cocky smart-aleck  who had little to no business in the court of the king, let alone as the King in the court. (at least according to the world's standards of 'kingliness') Nevertheless, God chose him - if for no other purpose than to illumine the weakness of worldly wisdom, strength, and valor.
Similarly - Luke catalogues the very intentional list of criteria the remain 11 engage in order to fill the vacancy in the roster resulting from Judas' demise. As if going thru check list of criteria:  He was one of us: check.  (Okay, check-list of criterion) And I can hear God remarking:  "well, okay, if that's hat you want to do, let's follow this path for a while and see where it leads."  And we never hear from the 'chose' one again.  But God chooses Paul (Saul) who functionally fills that space vacated by Judas - even if he is never really embraced by the other 11.  Saul, that antagonist of the Way:  Saul, the judge, jury and executioner of those who would profess to follow the Way:  Saul, the one thru whom the seeds of the gospel would be sown into and cultivated within the Gentile World. The most un-natural and unimaginable (least imaginable) of roll players. But there it is, God again upending our logical course of action in favor of something wholly (and Holy) other.