I do not lay claim to being a Greek grammarian as you apparently do but isn’t ?????? (ed?ken) – which in Ephesians 4:11 is translated as “gave” – actually an Aorist Active Indicative Verb (AAI)? You state that ?????? “refers to an act that Paul speaks of as past and completed.” Is it not true that the Proleptic (Futuristic) Aorist describes an event that is not yet past as though it were already completed?
That description describes Ephesians 4:11 to the proverbial “T”. This probably explains why so many, many versions of the Bible translate Ephesians 4:11 using the phrase “to be”? For an extensive list of examples see the list at the the bottom of my post. That said, allow me to highlight the Worldwide English New Testament. Its simplified vocabulary illustrates that this AAI points to an event that occurred in the past with an action which continues into the present.
apostles; some prophets; some evangelists; some pastors and teachers.” (Ephesians 4:11 – WENT – annotations in
Since your entire argument hinges on “an act that Paul speaks of as past and completed”, and since verbs in question from Romans 8:30 and Ephesians 4:11 are both Aorist Active Indicative Third Person Singular, and since any argument against one will impinge on the other, your argument fails. Nice try though. I always enjoy an anti-Mormon argument that is not stale and typical.
List of versions using TO BE in Ephesians 4:11 as an indicator of an event that is not yet past as though it were already completed said:
(ALT) And He gave some [to be] apostles, and some [to be] prophets, and some [to be] evangelists, and some [to be] shepherds [or, pastors] and teachers,
(AMP) And His gifts were [varied; He Himself appointed and gave men to us] some to be apostles (special messengers), some prophets (inspired preachers and expounders), some evangelists (preachers of the Gospel, traveling missionaries), some pastors (shepherds of His flock) and teachers.
(ASV) And he gave some to be apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;
(CENT) And he gave some to be apostles, some prophets, some evangelists, some pastors and teachers,
(CEV) Christ chose some of us to be apostles, prophets, missionaries, pastors, and teachers,
(Coverdale) And ye same hath set some to be Apostles, some to be prophetes, some to be Euangelistes, some to be shepherdes & teachers,
(EB) And, he, gave - some, indeed, to be apostles, and some, prophets, and some, evangelists, and some, shepherds and teachers,
(ELG-NT) He gave some to be apostles, some prophets, some evangelists, some shepherds and teachers.
(ERV) And that same Christ gave gifts to people—he made some people to be apostles, some people to be prophets, some people to go and tell the Good News, and some people to have the work of caring for and teaching God’s people.
(Geneva) Hee therefore gaue some to be Apostles, and some Prophets, and some Euangelists, and some Pastours, and Teachers,
(GNB-TEV) It was he who "gave gifts to people"; he appointed some to be apostles, others to be prophets, others to be evangelists, others to be pastors and teachers.
(HCSB) And He personally gave some to be apostles, some prophets, some evangelists, some pastors and teachers,
(HNV) He gave some to be emissaries; and some, prophets; and some, evangelists; and some, shepherds and teachers;
(ISV) And it is he who gifted some to be apostles, others to be prophets, others to be evangelists, and still others to be pastors and teachers,
(KJV-21) And He gave some to be apostles, and some prophets, and some evangelists, and some pastors and teachers,
(Knox NT) Some he has appointed to be apostles, others to be prophets, others to be evangelists, or pastors, or teachers.
(LITV) And indeed He gave some to be apostles; and some prophets; and some evangelists; and some pastors and teachers;
(MKJV) And truly He gave some to be apostles, and some to be prophets, and some to be evangelists, and some to be pastors and teachers,
(NCV) And Christ gave gifts to people -- he made some to be apostles, some to be prophets, some to go and tell the Good News, and some to have the work of caring for and teaching God's people.
(NHEBME ) He gave some to be apostles; and some, prophets; and some, evangelists; and some, shepherds and teachers;
(NIRV) He is the One who gave some the gift to be apostles. He gave some the gift to be prophets. He gave some the gift of preaching the good news. And he gave some the gift to be pastors and teachers.
(NIV) It was he who gave some to be apostles, some to be prophets, some to be evangelists, and some to be pastors and teachers,
(NJB) And to some, his 'gift' was that they should be apostles; to some prophets; to some, evangelists; to some, pastors and teachers;
(NKJV) And He Himself gave some to be apostles, some prophets, some evangelists, and some pastors and teachers,
(Noyes NT) And he gave some to be apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;
(NRSV) The gifts he gave were that some would be apostles, some prophets, some evangelists, some pastors and teachers,
(NSB) He gave some to be apostles; and some, prophets; and some, evangelists; and some, shepherds and teachers.
(RSV) And his gifts were that some should be apostles, some prophets, some evangelists, some pastors and teachers,
(RV) And he gave some to be apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;
(TCE) And he gave some to be apostles, some prophets, some evangelists, some pastors and teachers,
(VW) And He Himself gave some to be apostles, some prophets, some evangelists, and some pastors and teachers,
(WEB) He gave some to be apostles; and some, prophets; and some, evangelists; and some, shepherds and teachers;
(WENT) The gifts he gave are these: some are to be apostles; some prophets; some evangelists; some pastors and teachers.
(WmsNT) And He has given some men to be apostles, some to be prophets, some to be evangelists, some to be pastors and teachers,
(WNT) And He Himself appointed some to be Apostles, some to be Prophets, some to be evangelists, some to be pastors and teachers,
(WoNT) And He gave some to be apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;
(WorNT) And therefore He gave some to be apostles, some prophets, some evangelists, and some pastors and teachers; to qualify holy men for the work of the ministry,
UPDV) And he gave some [to be] apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;