As for 'diakonos', I see your point above, but the following verses use the same word.
Rom 13:4
For he is the
minister G1249 of God to thee for good. But if thou do that which is evil, be afraid; for he beareth not the sword in vain: for he is the
minister G1249 of God, a revenger to execute wrath upon him that doeth evil.
1Cr 3:5
Who then is Paul, and who is Apollos, but
ministers G1249 by whom ye believed, even as the Lord gave to every man?
2Cr 3:6
Who also hath made us able
ministers G1249 of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.
2Cr 6:4
But in all things approving ourselves as the
ministers G1249 of God, in much patience, in afflictions, in necessities, in distresses,
2Cr 11:15
Therefore it is no great thing if his
ministers G1249 also be transformed as the
ministers G1249 of righteousness; whose end shall be according to their works.
2Cr 11:23
Are they
ministers G1249 of Christ? (I speak as a fool ) I am more; in labours more abundant, in stripes above measure, in prisons more frequent, in deaths oft.
Eph 3:7
Whereof I was made a
minister, G1249 according to the gift of the grace of God given unto me by the effectual working of his power.
Eph 6:21
But that ye also may know my affairs, and how I do, Tychicus, a beloved brother and faithful
minister G1249 in the Lord, shall make known to you all things:
Col 1:7
As ye also learned of Epaphras our dear fellowservant, who is for you a faithful
minister G1249 of Christ;
Col 1:23
If ye continue in the faith grounded and settled, and be not moved away from the hope of the gospel, which ye have heard, and which was preached to every creature which is under heaven; whereof I Paul am made a
minister; G1249
Col 1:25
Whereof I am made a
minister, G1249 according to the dispensation of God which is given to me for you, to fulfil the word of God;
Col 4:7
All my state shall Tychicus declare unto you, who is a beloved brother, and a faithful
minister G1249 and fellowservant in the Lord:
1Th 3:2
And sent Timotheus, our brother, and
minister G1249 of God, and our fellowlabourer in the gospel of Christ, to establish you, and to comfort you concerning your faith:
1Ti 4:6
If thou put the brethren in remembrance of these things, thou shalt be a good
minister G1249 of Jesus Christ, nourished up in the words of faith and of good doctrine, whereunto thou hast attained.
Are you willing to admit that the above people named as 'diakonos' were merely servants and tablewaiters?